NZ272890A

NZ272890A - Psicopyranose and fructopyranose derivatives, analogs and medicaments

Info

Publication number: NZ272890A
Application number: NZ272890A
Authority: NZ
Inventors: David Billington; Gilbert Dorey; Pascale Leon; Ghanem Atassi; Alain Pierre; Michael Burbridge; Nicolas Guilbaud
Original assignee: Adir
Priority date: 1994-08-31
Filing date: 1995-08-30
Publication date: 1996-08-27
Also published as: FI954026A; FR2723947B1; ZA957322B; JPH0873484A; EP0699679A1; NO953400D0; CA2157156A1; US5595976A; FI954026A0; FR2723947A1; AU689290B2; NO953400L; AU3034595A; CN1127757A

Description

<div class="application article clearfix" id="description"> New Zealand Paient Spedficaiion for Paient Number £72890 7 c a f Priority Date(s): k Compote Specification Red; 3.?.-$. -? ? Ciass: (S) te.7Mslma6'MZHffJoZ tWHl3lll:r. £ S7.P4.?.?.//.?;.. fat T Publication Date: Ii'mg".#* P.O. Journal No: /fe>7 W96" No: Date: NEW ZEALAND PATENTS ACT, 1953 NZ. 3 0 AUG 1995 RECLlVLG COMPLETE SPECIFICATION NEW TETRAHYDROPYRAN COMPOUNDS, PROCESS FOR THE PREPARATION THEREOF, AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM We, ADIR ET COMPAGNIE, a French body corporate, of 1, rue Carle Hebert, F-92415 Courbevoie Cedex, France, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: -1 - (followed by page la) • 272890 The present invention relates to new glucidic compounds having a tetrahydropyran structure, to a process for the preparation thereof, and to pharmaceutical compositions containing them. The compounds of the present invention are highly valuable for therapeutic use on account of their angiogenesis-inhibiting ability. 5 Angiogenesis (or neovascularisation) is defined as the development and growth of new capillary blood vessels. The process of angiogenesis is essential in many physiological situations including the development of the embryo, the normal healing of injuries and the development of the endometrium after menstruation. Apart from those situations, angiogenesis in normal adults is very rare and the mitosis of the endothelial cells which 10 produces the walls of the blood vessels is very slow, with cell renewal times which are measured in years. Abnormal angiogenesis (that is to say, stimulation of the growth of new blood vessels owing to a pathological syndrome) is an established characteristic of many diseases, especially diabetic retinopathy, rheumatoid arthritis, haemangioma and the growth of solid tumours. 15 Angiogenesis can also play an important part in other diseases, such as arterio-coronary disease. In the field of oncology it has been shown that the growth of solid tumours is totally dependent upon the constant development of new blood vessels and that this is in correlation, for the metastases of certain cancers, with the increasing size of the primary tumour (J. 20 Folkman, New Engl Med., 285 (1974), 1182-1185). Pharmaceutical treatment (that is to say, by means of an angiogenesis inhibitor) can, therefore, stop the growth of primary tumours, prevent or reduce the formation of metastases, £u.d prevent the appearance of secondary growths. Such angiogenesis inhibitors are also useful in the treatment of non-neoplasic diseases mentioned above in which angiogenic activity occurs. 25 The needs of therapeutics demand the constant development of new angiogenesis-inhibiting compounds with the aim of obtaining active ingredients that are more active, more specific and, at the same time, less toxic. The present invention relates to new compounds that have a tetrahydropyran structure and that are structurally and pharmacologically original as compared with the compounds described in 30 the prior art. More particularly, the present invention relates to compounds of the general formula (I): ■2- 2728 in which : A - either represents -ORg, and B represents -CH2-X, - or, together with B and the carbon atom carrying them, forms an oxygen-containing heterocycle selected from oxirane, 2,2-dimethyl[l,3]dioxolane and [l,3]dioxolan-2- one, ^7 Rj - either represents the radicai: ^ Y Z in which Y and Z either each represent hydrogen or together form a double bond or together form, with the carbon atoms carrying them, an oxLane ring, and R2 is selected from hydrogen, a hydroxy radical and the radical -OR9, r_ r - or represents the radical: —O—(CH2)^—C—OT Y Z in which n is an integer from 1 to 4 inclusive and Y and Z either each represent hydrogen or together form a double bond or together form, with the carbon atoms carrying them, an oxirane ring, and R2 represents hydrogen, - or Ri represents hydrogen and Rj represents the radical: —c—CH as defined above, Y Z is selected from hydrogen, a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, an optionally substituted benzyl radical, an optionally substituted benzoyl radical, an optionally substituted formyl radical, a linear or branched, optionally unsaturated and optionally substituted acyl radical having from 1 to 6 carbon atoms, an allyl radical, and an optionally mono- or di-substituted carbamoyl radical, 272 890 R4 . either is selected from a hydroxy radical, a linear or branched, optionally substituted alkoxy radical having from 1 to 6 carbon atoms, an optionally mono- or di-substituted carbamoyloxy radical, a piperazinylcarbonyloxy radical substituted in the 4-position by the radical R9, and an imidazol-l-ylcarbonyloxy radical, and R5 represents hydrogen, - or, together with R5 and the carbon atom carrying them, forms a carbonyl group, Kg, R7 and Rg are selected, each independently of the others, from hydrogen, a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, and a phenylalkyl radical in which the phenyl group is optionally substituted and the alkyl group, which is linear or branched and is optionally substituted, has from 1 to 6 carbon atoms, R9 is selected from hydrogen, a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, an optionally substituted formyl radical, a linear or branched, optionally unsaturated and optionally substituted acyl radical having from 1 to 6 carbon atoms, a linear or branched, optionally substituted alkoxycarbonyl radical having from 1 to 6 carbon atoms, an optionally substituted benzyl radical, and an optionally mono- or di-substituted carbamoyl radical, X is selected from a hydroxy radical, a halogen atom, an optionally substituted phenyl-sulphonyloxy radical, and an optionally substituted linear or branched alkylsulphonvloxy radical having from 1 to 6 carbon atoms, where appropriate their optical and geometrical isomers, in pure form or in the form of a mixture, and, where appropriate, their pharmaceutically acceptable addition salts with an acid, wherein: - the term "optionally mono- or di-substituted" associated with the above-defined carbamoyl and carbamoyloxy radicals indicates that one or both of the hydrogen atoms carried by the nitrogen atom may be substituted (independently of each other when both hydrogen atoms are substituted) by: - a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, - an optionally substituted formyl radical, • "4" 272 8 - a linear or branched, optionally unsaturated and optionally substituted acyl radical having from 1 to 6 carbon atoms, - an optionally substituted benzoyl radical, - an optionally substituted phenyl radical, 5 - an optionally substituted naphthyl radical, and - an amino radical optionally substituted by one or two alkyl radicals having from 1 to 6 carbon atoms in a straight or branched chain, each alkyl radical being optionally substituted, - the term "optionally substituted" associated with the alkyl, alkoxy, alkoxycarbonyl, formyl, io acyl, benzyl, benzoyl, phenyl and naphthyl radicals indicates that those radicals may be substituted by one or more chemical entities selected from hydroxy, halogen, trihalomethyl, amino, alkylamino, dialkylamino, linear or branched alkoxy having from 1 to 6 carbon atoms, linear or branched alkoxycarbonyl having from 1 to 6 carbon atoms, and linear or branched acyl having from 1 to 6 carbon atoms, 15 - the term "optionally substituted" associated with the alkylsulphonyloxy and phenyl-sulphonyloxy radicals indicates that those radicals may be substituted by one or more linear or branched alkyl radicals having from 1 to 6 carbon atoms, and - the term "unsaturated acyl radical" is to be understood as meaning more especially the acryloyl and methacryloyl radicals. 20 In the present invention, carbamoyl radical is to be understood as meaning the radical H I C H 11 H O H and carbamoyloxy radical is to be understood as meaning the radical |j H O Of the acids that can be used for the formation of pharmaceutical^ acceptable salts there may be mentioned, by way of non-limiting example, hydrochloric acid, phosphoric acid, sulphuric 25 acid, tartaric acid, citric acid, maleic acid, fumaric acid, etc.. The present invention relates also to a process for the preparation of a compound of formula (I), characterised in that l,2:4,5-di-0-isopropylidene-(5-D-fructopyranose of formula (II): ■5- 90 an/ OH ^ prepared in accordance with the procedure described by EJ. Prisbe et al (J. Org. Chem., 41, (1976), 1836-1846), is subjected either : to an oxidising agent, such as pyridinium dichromate, so as to obtain the ketone of formula (III): a./0 o which is subjected to the action of a compound of formula (IVa) prepared from the corresponding vinyl halide: Li y=\ n* *» (iVa) in which R7 and Rg are selected, each independently of the other, from hydrogen, a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, and a phenylalkyl radical in which the phenyl group is optionally substituted and the alkyl group, which is linear or branched and is optionally substituted, has from 1 to 6 carbon atoms, in order to obtain the compound of formula (Vaj) X (Vaj) in which R7 and Rg are as defined above, -6- 272890 which may optionally be subjected to the action of an alkyl halide, an acyl halide, a benzyl halide, an alkyl haloformate or an isocyanate in order to yield the compound of formula (Va2>: in which R7 and Rg are as defined above and R'9 is selected from a linear or branched, optionally substituted alkyl radical containing from 1 to 6 carbon atoms, an optionally substituted formyl radical, an optionally substituted acyl radical containing from 1 to 6 carbon atoms, an optionally substituted benzyl radical, a linear or branched, optionally substituted alkoxycarbonyl radical containing from 1 to 6 carbon atoms, and an optionally mono- or di-substituted carbamoyl radical, which compound of formula (Vai) may optionally be subjected to the action of methyloxalyl chloride, in the presence of n-butyllithium, so as to obtain the compound of formula (Va3): O in which R7 and Rg are as defined above, which is then subjected to the action of tributyltin hydride in order to yield the compound of formula (Va4): 272 8 r T","ir oMi \ = H ^ (Va4) Rs in which R7 and Rg are as defined above, the totality of the compounds of formulae (Vaj) and (Va2> forming the compound of formula (Va): [••ill/ in which R7 and Rg are as defined above and R9 is selected from hydrogen and the radical R*9 as defined above, or : directly to the action of a compound of formula (IVb): Br-(CH2),-/ ([vb) 10 in which R7 and Rg are as defined above and n is an integer from 1 to 4 inclusive, in order to obtain the compound of formula (Vb): q^'kr^'0-(CH2)B—(Vb) Rs in which R7, Rg and n are as defined above, the compounds of formulae (Va4), (Va) and (Vb) then being hydrolysed in an acidic medium, for example acetic acid, to yield the diols of formulae (VIa4), (Via) and (Vlb), respectively : X X r°i ^ / /° OH f - OR. = \\ \\v HO Rg OH * * OH *« k8 (VIa4) (Via) (Vlb) in which R7, Rg, R9 and n are as defined above, which compounds of formulae (Vla4), (Via) and (Vlb) may be regioselectively substituted in the presence of dibutyltin oxide so as to obtain the compounds of formulae (Vlla4), (Vila) and (Vllb), respectively: ^ < rK * M-'i OR', f TA \\ HO I OR. \\ HO I ' \\ OR* r R, ' R, 'VIIa4' (Vila) (VDb) in which R7, Rg, R9 and n are as defined above and R'3 is selected from a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, an optionally substituted benzyl radical, an optionally substituted benzoyl radical, an optionally substituted formyl radical, a linear or branched, optionally unsaturated and optionally substituted acyl radical having from 1 to 6 carbon atoms, an allyl radical, and an optionally mono- or di-substituted carbamoyl radical, it being possible for all of the compounds of formulae (VIa4) and (VIIa4), (Via) and (Vila) and (Vlb) and (VHb) optionally to be subjected to an epoxidation reagent, such as 3-chloroperbenzoic acid, in order to yield the compounds of formulae (VIIIa4), (Villa) and (Vmb), respectively: O—(CH,) -9- 2728 s< X „V ^ '* O." A HO-Vl V° ho-'-V^O-cch,,, °«3 | SR^Y ^ R, (vma4' (vma) (vmb) in which R7, Rg, R9 and n are as defined above and R3 is selected from hydrogen and the radical R'3 as defined above, or alternatively to be subjected to catalytic hydrogenation in order to obtain the compounds of 5 formulae (VHI'a^, (Villa) and (VEEITd), respectively: K X .v r°i/ (vm'a4) (vm'a) (vnrb) in which R3, R7, Rg, R9 and n are as defined above, the totality of the compounds of formulae (VIa4), (Via), (Vlb), (VIIa4), (Vila), (Vllb), (VIHa4), (VlUa), (vmb), (Vnra4), (Vnra) and (Vlll'b) forming the compound of formula 10 (Vni): (VIE) 6R3 Ra in which: R>> r 18 Rj - either represents the radical: ^ Y Z -10- 272 in which Y and Z either each represent hydrogen or together form a double bond or together form, with the carbon atoms carrying them, an oxirane ring, and R7 and Rg are as defined above, and R2 is selected from hydrogen, a hydroxy radical and the radical -OR9, R? - or represents the radical: —O—(CH2)^—C—CH Y Z in which n is an integer from 1 to 4 inclusive and R7, Rg, Y and Z are as defined above, 10 and R2 represents hydrogen, - or R^ represents hydrogen R7 R* V r and R, represents the radical: —-C—CH as defined above, ^ I I Y Z and R3 is as defined above, the compound of formula (VIII) then optionally being subjected: 15 - to the action of an alkylating agent under customary conditions, for example after formation of an anion by means of sodium hydride, - to the action of an isocyanic compound in the presence or absence of an activator, such as 4-dimethylaminopyridine, - or to the action of a carbonylating compound, caibonyldiimidazole, yielding the compound 20 of formula (IXa): o f°A /° (IXa) \ -J n R N" <° in which Rj, R2 and R3 are as defined above, which compound, under the action of a piperazine substituted in the 4-position by the radical R9, itself yields the compound of formula (DCb): in which Rj, R2, R3 and R9 are as defined above, the totality of the compounds of formulae (VHI), (IXa) and (IXb) forming the compound of formula (IX): in which Rj, R2 and R3 are as defined above and R4 is selected from a hydroxy radical, a linear or branched, optionally substituted alkoxy radical having from 1 to 6 carbon atoms, an optionally mono- or di-substituted carbamoyloxy radical, a piperazinylcarbonyloxy radical substituted in the 4-position by the radical R9, and an imidazolylcarbonyloxy radical, it also being possible for the compound of formula (VHI) to be subjected to the action of an oxidising agent under the conditions employed for the preparation of the compound of formula (m), so as to obtain the compound of formula (X): (IX) < o Rj (X) o R2 in which Rj, R2 and R3 are as defined above, the totality of the compounds of formulae (IX) and (X) forming the compound of formula (XI): -12- "*7 C. * £> (XI) in which Rj, R2 and R3 are as defined above and R4 and R5 are as defined for formula (I), which compound (XI) may be: s - either : treated in accordance with customary methods of alcoholysis in order to form the compound of formula (XII): _ |R'« OH S A / R'7TTR' (xn, R,'0 ^ in which Rj, R2, R3, R4 and R5 are as defined above and R'6 is selected from a linear or branched, optionally substituted alkyl radical having from 1 to 6 10 carbon atoms, and a phenylalkyl radical in which the phenyl group is optionally substituted and the alkyl group, which is linear or branched and is optionally substituted, has from 1 to 6 carbon atoms, then subjected to customary substitution reactions so as to obtain the compound of formula (XHI): OR". 15 « ■6 X' / R4 = - ■ „o R* R3 (xm) in which Rj, R2, R3, R4, R5 and R'g are as defined above and X' is selected from a halogen atom, an optionally substituted phenylsulphonyloxy radical, and an optionally substituted linear or branched alkylsulphonyloxy radical having from 1 to 6 carbon atoms, 20 - or : hydrolysed, under the action of an acidic resin, for example, to form the diol of formula (XIV): - 13 MT&y f) OH r±J R4 = ' Ov *2 «3 OH 2 B (XIV) in whichRj, R2, R3, R4 and R5 are as defined above, then optionally subjected to customary substitution reactions so as to obtain the compound of formula (XV): OH X' R4 = * yO Rj R3 (XV) in which Rj, R2, R3, R4, R5 and X' arc as defined above, which compound of formula (XV), when X' represents an iodine atom, can be converted, under the action of silver oxide, into the epoxide of formula (XVI): Rs^k^R, R4 = t (XVI) o R* in which Rj, R2, R3, R4 and R5 are as defined above, it also being possible for the compound of formula (XTV) to be subjected to the action of N,N-carbonyldiimidazole to yield the compound of formula (XVII): O (XVII) in which Rj, R2, R3, R4 and R5 are as defined above, the compounds of fonnulae (XI), (XII), (XIII), (XIV), (XV), (XVI) and (XVII) forming the compound of formula (I), which is optionally purified by a customary purification method and the optical and geometrical isomers of which are separated, if desired, by a customary 14- 2 1 o / L separation method, and which are optionally converted into their pharmaceutical^ acceptable addition salts with an acid. The compound of formula (Vaj) in which R7 represents hydrogen can advantageously be obtained by reaction of an organolithium compound, prepared from the corresponding propargyl compound, of formula (TVa1): —===—Li (IVa') in which Rg is as defined above, then by catalytic hydrogenation of the resulting alkyne of formula (Vaj'): X Lull/ in which Rg is as defined above. The compound of formula (VIII) can be protected regioselectively in the form of a silylated compound of formula (VHT): X (vnr) in which Rj and R2 are as defined above and Ra, R5 and Rc each independently of the others represent a linear or branched alkyl radical containing from 1 to 6 carbon atoms, or 3 phenyl radical. In general, the protection and deprotection of the hydroxy radicals carried by the pyranose compounds, the catalytic hydrogenation reactions and the epoxidation reactions by means of 3-chloroperbenzoic acid can be carried out at the time considered appropriate by the person skilled in the art, in the course of the synthesis of each compound. - 15- 27 The compounds of formula (I) have valuable pharmacological properties. In fact, the compounds are powerful angiogenesis inhibitors which have the advantage of being much less toxic as compared with the reference compounds. They therefore have an excellent therapeutic index. Accordingly, the compounds can be used in therapeutics as anti-tumour agents, in the inhibition of the formation and growth of metastases, as well as in the treatment of diabetic retinopathy, rheumatoid arthritis, haemangioma and arterio-coronary diseases, and more generally in disorders due to or associated with angiogenesis disorders. The present invention relates also to pharmaceutical compositions comprising the compounds of formula (I), their stereoisomers, where appropriate, or, where appropriate, their pharmaceutically acceptable addition salts with an acid, on their own or in combination with one or more inert, non-toxic excipients or carriers. Of the pharmaceutical compositions according to the invention there may be mentioned more especially those which are suitable for oral, parenteral, nasal, rectal, perlingual, ocular or respiratory administration, especially tablets, dragles, sublingual tablets, sachets, paquets, gelatin capsules, glossettes, lozenges, suppositories, creams, ointments, dermic gels, injectable or drinkable preparations, aerosols, ocular or nasal drops. The dosage used varies according to the age and weight of the patient, the mode of administration and the nature of the therapeutic indication and of any associated treatments, and ranges from 0.01 to 1 g per day, in one or more administrations. The Examples which follow illustrate the invention but do not limit it in any way. The starting materials are known or are prepared by known procedures. The nomenclature used for naming the compounds of the invention is that recommcndcd in "Modern Carbohydrate Chemistry" by Roger W. Binkley, Editions Marcel Dekker Inc., New York (1988). The numbering and stereochemistry of p-D-psicopyranose which are used in the Examples which follow comply with the formula: OH - ft-D-psicopvranose - 16- 272890 The numbering and stereochemistry of (J-D-fructopyranose which are used in the Examples which follow comply with the formula: Example 1: l^-O-Isopropylldene-3-Isopropenyl-p-D-psicopyranose 5 Step A : l,2:4,5-di-0-isopropylidene-P-D-co'/ftro-2,3-hexodiulo-2,6-pyranose 2.44 g of 0.3 nm molecular sieve are added to 1.00 g (3.84 mmol) of l,2:4,5-di-0-isopropylidene-P-D-fructopyranose, prepared in accordance with the procedure described by Prisbe E.J. et al. (J. Org. Chem., 41, (1976), 1836), dissolved in 20 ml of anhydrous methylene chloride. The reaction mixture is cooled to 10°C with the aid of an ice-bath, and 10 1.38 g (6.48 mmol) of pyridinium dichromate followed by 0.3 ml (5.24 mmol) of glacial acetic acid are added. The reaction mixture is stirred at 10°C for 5 hours and is then concentrated (to 5 ml) in vacuo. 30 ml of diethyl ether are added and the whole is filtered. The filtrate is then evaporated and the resulting solid residue is chromatographed on silica gel (eluant: ethyl acetate/pentane, 3:2). 0.81 g (3.14 mmol) of the desired product in the form of a 15 white-coloured solid is isolated. XieM:81% Spectral characteristics: *H NMR (DMSO) 5 (ppm): 1.30 (3H, s); 1.31 (3H, s); 1.35 (3H, s); 1.48 (3H, s); 3.90 (1H, d); 4.05 (1H, d); 4.25 (1H, d); 4.40 (1H, d); 4.61 (1H, dd); 4.82 (1H, d). 20 StepB: l,2:4,5-di-0-isopropylidene-3-isopropenyl-f)-D-psicopyranose 5.69 ml of tert.-butyllithium (1.7 M in pentane, i.e. 9.67 mmol) are added dropwise, under a nitrogen atmosphere, to a solution, cooled to -78°C, of 1.03 ml of 2-bromopropene (1.40 g; 11.59 mmol) in 8.5 ml of anhydrous diethyl ether. The whole is stirred at -78°C for 5 minutes and then at 0°C for one hour. The solution is then added dropwise to a solution, cooled to -78° 25 C, of the product obtained in step A (1 g; 3.87 mmol) in 15 ml of anhydrous toluene. After 45 minutes' stirring at -78°C, the reaction mixture is poured into a 10% aqueous ammonium chloride solution (40 ml) cooled to 0°C. The whole is diluted with diethyl ether (100 ml) and the reaction mixture is extracted. Customary treatment of the organic phase yields an oily OH - ft-n-fmctopvranose - 97? P -17- i; L. Q residue, which is chromatographed on silica gel (eluant: pentane/ethyl acetate, 8:1). 0.55 g (1.83 mmol) of the desired product is obtained in the form of a white foam. Xifild: 47% Spectral characteristics: !h NMR (DMSO) 8 (ppm) : from 1.25 to 1.50 (12H, m) ; 1.85 (3H, s) ; 3.40 (1H, s, exchangeable with P20); 3.80 (1H, d); 4.00 (1H, d); 4.05 (2H, d); 4.34(1H, dd); 4.45 (1H, d); 5.10 (1H, s); 5.25 (1H, s). StepC: l,2-0-isopropylidei3e-3-isopropenyl-|i-D-psicopyranose A solution of 4 g (13.32 mmol) of the compound obtained in step B in 100 ml of an acetic acid/water mixture, 4:1, is stirred at room temperature for 17 hours. The solvents are evaporated off under reduced pressure, the residue is taken up in 50 ml of toluene, and then evaporation is carried out again. That operation is repeated twice to yield, after 24 hours' drying under a high vacuum, 3.28 g (12.60 mmol) of the desired compound (purity > 99% by gas chromatography) in the form of a white-coloured powder. Xisld: 96% Spectral characteristics: iH NMR (DMSO) 5 (ppm) : 1.30 (3H, s) ; 1.38 (3H, s) ; 1.85 (3H, s) ; 3.65 (1H, d); 3.75 (1H, d); 3.81 (1H, m); 3.82 (1H, m); 3.85 (1H, d); 4.10 (1H, d); 4.55 (1H, d, exchangeable with D2O); 5.05 (1H, s); 5.08 (1H, s, exchangeable with D2O) ; 5.16 (1H, s); 5.60 (1H, d, exchangeable with D2O). Example 2: l,2-0-Isopropylidene-3-isopropenyl-4-0-methyl-P-i>-psicopyranose 7.65 g (30.70 mmol) of dibutyltin oxide are added to a solution of 4 g (15.37 mmol) of the compound obtained in Example 1 in 120 ml of methanol. The heterogeneous reaction mixture is stirred and heated at reflux until a clear solution is obtained (approximately 24 hours). The mixture is cooled and then the solvent is evaporated off under reduced pressure. The solid residue is taken up in 70 ml of dioxane and is stirred under a nitrogen atmosphere. 6 ml (96.37 mmol) of methyl iodide are added and the whole is heated at reflux until the starting material has disappeared completely (approximately 60 hours). The dioxane is then evaporated off in vacuo and the resulting solid residue is chromatographed on silica gel (eluant: pentane/ethyl acetate, 2:1 then 1:1). 3.8 g (13.85 mmol) of the desired compound in the form of a white solid are obtained. Xifild: 90% Ol 0 o -18- c, t L u Spectral characteristics: !h NMR (DMSO) 5 (ppm): 1.25 (3H, s); 1.32 (3H, s); 1.80 (3H, s); 3.28 (3H, s); 3.50 (1H, d); 3.70 (2H, d); 3.82 (1H, d); 4.08 (1H, d); 4.18 (1H, s broad); 5.02 (1H, s); 5.15 (1H, s); 5.38 (1H, s, exchangeable with D2O); 5.70 (1H, s broad, exchangeable with D2O). 5 Example 3 : 5-0-Chloroacetylcarbamoyl-l,2-0-isopropylidene-3-isopropenyl-4-0-methy 1- p -D-pslcopyranose 2.39 ml (3.35 g; 28.05 mmol) of chloroacetyl isocyanate are added dropwise, under a nitrogen atmosphere, to a solution, cooled to 0°C, of 5.00 g (18.23 mmol) of the compound obtained in Example 2 in 90 ml of anhydrous methylene chloride. After 40 minutes' stirring at 0°C, the 10 reaction mixture is poured into 50 ml of ice-water and the whole is stirred for one hour. After customary treatment of the organic phase and purification of the crude product by chromatography on silica gel (eluant: diethyl ether/petroleum ether, 4:1), 5.7 g (14.47 mmol) of the desired compound in the form of a white-coloured foam are obtained. Xisid: 79% 15 Spectral characteristics: *H NMR (DMSO) 8 (ppm): 1.30 (3H, s); 1.40 (3H, s); 1.83 (3H, s) ; 3.29 (3H, s) ; 3.75 to 3.90 (3H, m); 4.00 (1H, d); 4.10 (1H, s, exchangeable with D2O); 4.12 (1H, d); 4.46 (2H, s) ; 5.09 (1H, s broad); 5.29 (1H, d); 5.41 (1H, s); 11.02 (1H, s, exchangeable with D20). Elemental analysis: (empirical formula: C16H24CINO8 M = 393.82) 0 20 C H N CI % found 48.78 5.80 3.82 9.03 % calc. 48.80 6.14 3.56 9.00 Example 4 : 5-0-Chloroacetylcarbamoyl-lt2-0-isopropylidene-3-(2-methyloxiran-2-yl)-4-O-methy 1-f}-D-psicopyranose 25 5.00 g (21.15 mmol) of 72% 3-chloroperbenzoic acid are added to a solution of 5.70 g (14.47 mmol) of the compound obtained in Example 3 in 140 ml of methylene chloride. The reaction mixture is stirred at room temperature for 15 hours. The solid formed during the reaction is filtered and then the filtrate is evaporated under reduced pressure. The solid residue is purified by chromatography on silica gel (eluant: ethyl acetate/pentane, 2:1). The desired compound 30 (4.20 g; 10.25 mmol) is obtained in the form of a white-coloured solid. Yield: 70% Spectral characteristics: NMR (DMSO) 8 (ppm) : 1.40 (6H, s) ; 1.40 (3H, s) ; 2.45 (1H, d); 2.80 (1H, d) ; 3.33 (3H, s); 3.75 to 3.81 (3H, m); 3.85 (1H, s, exchangeable with D2O); 4.00 (1H, d); 4.22 (1H, d); 4.46 (2H, s); 5.35 (1H, s broad); 10.90 (1H, s, exchangeable with D2O). Elemental analysis: (empirical formula: C15H24CINO9 M = 409.82) C H N CI % found 46.89 5.78 3.29 8.64 % calc. 46.89 5.90 3.42 8.65 Example 5 : l,2-0-Isopropylidene-3-isopropenyI-4-0-methyI-5-0-methylcarbamoyl-P-D-psicopyranose 0.90 ml (0.83 g; 14.56 mmol) of methyl isocyanate is added dropwise, under a nitrogen atmosphere, to a solution, cooled to 0°C and containing 1.34 g (10.97 mmol) of 4-dimethylaminopyridine, of 2.00 g (7.29 mmol) of the compound obtained in Example 2 in 40 ml of anhydrous methylene chloride. After one hour's stirring at 0°C, the reaction mixture is poured into 20 ml of ice-water and the whole is stirred for one hour. After customary treatment of the organic phase and then purification of the crude product by chromatography on silica gel (eluant: diethyl ether), 2.3 g (6.94 mmol) of the desired compound in the form of a white-coloured foam are obtained. Yield: 95% Spectral characteristics: NMR (DMSO) 8 (ppm) : 1.30 (3H, s) ; 1.40 (3H, s) ; 1.80 (3H, s); 2.60 (3H, d) ; 3.25 (3H, s); 3.70 to 3.75 (3H, t); 3.89 (1H, s, exchangeable with D2O); 3.90 (1H, d); 4.12 (1H, d); 5.02 (1H, s); 5.20 (1H, s); 5.25 (1H, s); 7.30 (1H, q, exchangeable with D20). Example 6: l,2-0-Isopropylidene-3-(2-methyloxiran-2-yl)-4-0-methyl-5-0-methyl-carbamoyl-f}-D-psicopyranose This compound is obtained in a manner identical to that described in Example 4, starting from 0.20 g (0.60 mmol) of the compound obtained in the preceding Example, 0.15 g (1.78 mmol) of solid sodium hydrogen carbonate and 0.22 g (0.93 mmol) of 72% 3-chloroperbenzoic acid. Yield: 72% Spectral characteristics: *H NMR (DMSO) 6 (ppm) : 1.35 (9H, s) ; 2.40 (1H, d) ; 2.60 (3H, s) ; 2.75 (1H, d) ; 3.30 (3H, s); 3.65 (1H, s, exchangeable with D20); 3.70 to 3.80 (3H, m); 3.90 (1H, d); 4.20 (1H, d); 5.20 (1H, s broad); 7.20 (1H, q, exchangeable with D20). Elemental analysis: (empirical formula: Cj5H25NO8 M = 347.37) C H N % found 51.95 7.25 4.09 % calc. 51.87 7.25 4.03 Example 7 : 5-0-Benzoylcarbamoyl-l,2-0-isopropylidene-3-isopropenyl-4-0-methyl-P-D-psicopyranose Following the procedure described for the preparation of Example 5, starting from 1.20 g (4.37 mmol) of the compound obtained in Example 2 and 0.96 g (6.52 mmol) of benzoyl isocyanate, and after purification by chromatography on silica gel (eluant: diethyl ether/methylene chloride, 2:1), 1.30 g (3.08 mmol) of the desired product are obtained. Yifild: 70% Spectral characteristics: NMR (DMSO) 8 (ppm): 1.30 (3H, s) ; 1.40 (3H, s); 1.85 (3H, s); 3.31 (3H, s); 3.72 (1H, d) ; 3.80 (1H, d) ; 3.89 (1H, d); 4.05 (1H, d); 4.15 (1H, d); 4.40 (1H, s, exchangeable with D20); 5.05 (1H, s broad); 5.25 (1H, s broad); 5.50 (1H, s broad); 7.52 (2H, t); 7.62 (1H, t) ; 7.90 (2H, d); 11.12 (1H, s, exchangeable with D2O). Example 8: 5-0-Benzoylcarbamoyl-l,2-0-isopropyIidene-3-(2-methyloxiran-2-yl)-4-0-methyl-P-D-psicopyranose Following the procedure described for the preparation of Example 4, starting from 0.25 g (0.59 mmol) of the compound obtained in Example 7 and 0.22 g (0.93 mmol) of 72% 3-chloroperbenzoic acid, then purification by chromatography on silica gel (eluant: diethyl ether/heptane, 5:1), 0.10 g (0.23 mmol) of the desired compound in the form of a white-coloured foam is collected. Yield: 39% Spectral characteristics: JH NMR (DMSO) 8 (ppm): 1.40 (9H, s); 2.41 (1H, d) ; 2.81 (1H, d); 3.35 (3H, s); 3.70 to 3.82 (3H, m); 4.00 (1H, d); 4.25 (1H, d); 4.30 (1H, s, exchangeable with D20); 5.40 (1H, s broad); 7.52 (2H, t); 7.61 (1H, t) ; 7.88 (2H, d); 10.96 (1H, s, exchangeable with D20). -21 - 2 / Z) 9 Elemental analysis: (empirical formula: C21H27NO9 C H N M = 437.45) % found 57.84 6.27 3.04 % calc. 57.66 6.22 3.20 5 Example 9 : 3-Isopropenyl-4-0-methyl-5-0-methylcarbamoyl-p-D-psicopyranose 20 g of acidic resin (DOWEX 50X8-100) are added to a suspension of 1.10 g (3.24 mmol) of the compound obtained in Example 5 in 40 ml of water. The whole is heated at 60°C for 80 minutes and is then stirred at room temperature for 1.5 hours. The reaction mixture is filtered and the filtrate is evaporated to give 0.92 g (3.15 mmol) of the desired triol in the form of a 10 white foam. Yield: 97% Spectral characteristics: *H NMR (DMSO) 8 (ppm): 1.80 (3H, s); 2.60 (3H, d); 3.20 (3H, s); 3.35 to 3.60 (4H, m, of which 1H exchangeable with D2O); 3.80 (1H, d); 4.00 (1H, m); 4.60 (1H, m, exchangeable 15 with D2O) ; 4.89 (1H, s broad) ; 5.15 (1H, s broad) ; 5.22 (1H, s broad) ; 5.50 (1H, s, exchangeable with D2O) ; 7.25 (1H, q, exchangeable with D2O). Example 10: l-(para-ToluenesuIphonyl)-3-isopropenyI-4-0-methyl-5-0-methyl 8.94 g (46.89 mmol) of tosyl chloride are added, at room temperature and under a nitrogen 20 atmosphere, to a solution of 3.90 g (13.39 mmol) of the triol obtained in Example 9 in 40 ml of anhydrous pyridine. After 2 hours' stirring at room temperature, the reaction mixture is poured into 30 ml of an aqueous ammonium chloride solution (10%) cooled to 0°C. The reaction mixture is then diluted in 200 ml of ethyl acetate and then the two phases are separated. After customary treatment of the organic phase and purification of the crude 25 product by chromatography on silica gel (eluant: diethyl ether), 4.98 g (11.18 mmol) of die desired product in the form of a white foam are obtained. Xield: 83% Spectral characteristics: !h NMR (DMSO) 8 (ppm): 1.70 (3H, s) ; 2.40 (3H, s) ; 2.70 (3H, d) ; 3.25 (3H, s) ; 3.60 30 (1H, d) ; 3.75 (1H, s, exchangeable with D2O); 3.80 (1H, d) ; 3.90 to 4.00 (3H, m); 4.85 (1H, s broad); 5.05 (1H, s broad); 5.20 (III, s broad) ; 6.60 (1H, s, exchangeable with D20); 7.22 (1H, q, exchangeable with D2O); 7.48 (2H, d); 7.75 (2H, d). carbamoyl-P-D-psicopyranose -22- f F , Example 11: l-(pflra-Toluenesulphonyl)-3-(2-methyloxiran-2-yI)-4-0-methyl-5-0-methylcarbamoyl-(3-D-psicopyranose ' Following the procedure described for the preparation of Example 4, starting from 0.25 g (0.56 mmol) of the compound obtained in the preceding Example and 0.21 g (0.89 mmol) of s 72% 3-chloroperbenzoic acid, then purification by chromatography on silica gel (eluant: pentane/ethyl acetate, 1:1), 0.16 g of the desired product in the form of a white-coloured foam is obtained. ' Yield: 61% Spectral characteristics: 10 lH NMR (DMSO) 8 (ppm) : 1.80 (3H, s) ; 2.20 (1H, d) ; 2.40 (3H, s); 2.50 (1H, m); 2.55 (3H, d); 3.25 (3H, s); 3.44 (1H, s, exchangeable with D20); 3.60 (1H, d); 3.80 to 3.85 (2H, m) ; 4.00 (1H, d) ; 4.10 (1H, d); 5.11 (1H, s broad) ; 6.72 (1H, s, exchangeable with D2O); 7.05 (1H, q, exchangeable with D20) ; 7.49 (2H, d); 7.80 (2H, d). Elemental analysis: (empirical formula : C19H27NO10S M = 461.48) 15 C H N S % found 49.83 6.34 3.15 6.64 % calc. 49.45 5.90 3.04 6.95 f ? n n Example 12: l-Bromo-l-desoxy-3-isopropenyl-4-0-methyl-5-0-methylcarbamoyl-fi-D-psicopyranose I 20 0.29 g (3.34 mmol) of lithium bromide is added at room temperature, in a single portion, to a solution of 0.31 g (0.69 mmol) of the compound obtained in Example 10 in 15 ml of acetone. The reaction mixture is placed under stirring and then heated at 75°C for 1.5 hours. A further 0.26 g (2.99 mmol) of lithium bromide is then added and the whole is again heated at 75°C | for one hour. The acetone is evaporated off under reduced pressure and the residue is taken up 25 in 20 ml of ethyl acetate. Customary treatment of the organic phase yields 0.23 g (0.65 mmol) of the desired product in the form of a white-coloured foam. Yield: 94% Spectral characteristics: NMR (DMSO) 8 (ppm) : 1.80 (3H, s) ; 2.60 (3H, d) ; 3.22 (3H, s) ; 3.52 (1H, d) ; 3.70 30 (1H, d); 3.78 (1H, d) ; 3.82 (1H, s, exchangeable with D20) ; 3.89 (1H, d) ; 4.05 (1H, d) ; 4.95 (1H, s broad); 5.20 (1H, s broad) ; 5.23 £1H, s broad); 6.20 (1H, s, exchangeable with D20); 7.30 (1H, q, exchangeable with D20). -23- Example 13: l-Bromo-l-desoxy-3-(2-methyloxiran-2-yl)-4-Q-methyl-5-0-methyl-carbamoyl-fi-D-psicopyranose Following the procedure described for the preparation of Example 4, starting from 0.23 g (0.65 mmol) of the compound obtained in the preceding Example and 0.23 g (0.97 mmol) of 72% 3-chloroperbenzoic acid, then purification by chromatography on silica gel (eluant: diethyl ether), 0.16 g (0.43 mmol) of the desired compound in the form of a white-coloured solid is obtained. YisM: 66% Spectral characteristics: *H NMR (DMSO) 8 (ppm) : 1.35 (3H, s) ; 2.32 (1H, d); 2.58 (3H, d); 2.72 (1H, d) ; 3.28 (3H, s) ; 3.45 (1H, s, exchangeable with D2O); 3.62 (1H, d) ; 3.69 (2H, s) ; 3.90 (1H, d) ; 3.99 (1H, d) ; 5.12 (1H, s broad) ; 6.32 (1H, s, exchangeable with D20) ; 7.10 (1H, q, exchangeable with D20). Elemental analysis: (empirical formula: Ci2H2()BrN07 M = 370.20) C H N Br % found 38.72 5.18 3.33 21.64 % calc. 38.93 5.45 3.78 21.58 Example 14: l,2-0-Isopropylidene-3-isopropenyI-4,5-di-0-methyl-P-D-psicopyranose 3.28 g (12.60 mmol) of the compound obtained in Example 1 in solution in 35 ml of anhydrous N,N-dimethylformamide are added dropwise, at room temperature, to a suspension of sodium hydride (60% in oil; 1.10 g; 27.50 mmol) in 50 ml of anhydrous N,N-dimethylformamide. The reaction mixture is stirred at room temperature for 30 minutes and is then cooled to 0°C before the dropwise addition of 2.35 ml (5.36 g; 37.75 mmol) of methyl iodide. After 50 minutes' stirring at 0°C, the reaction mixture is poured into 100 ml of an aqueous ammonium chloride solution (10%) cooled to 0°C. Customary treatment of the organic phase yields, after purification by chromatography on silica gel (eluant: pentane/ethyl acetate, 8:1 then 5:1), 2.93 g (10.16 mmol) of the desired product in the form of a yellow-coloured oil. lifilil: 80% Spectral characteristics: ]H NMR (DMSO) 8 (ppm): 1.29 (3H, s) ; 1.35 (3H, s); 1.80 (3H, s); 3.30 (3H, s); 3.40 (3H, s) ; 3.65 (1H, d) ; 3.72 (2H, m) ; 3.95 (1H, s) ; 3.97 (1H, d) ; 4.05 (1H, d) ; 4.49 (1H, s, exchangeable with D20); 5.02 (1H, s broad); 5.15 (1H, s broad). Example 15 : l,2-0-Isopropylidene-3-(2-methyloxiran-2-yI)-4,5-di-0-methyl-|3-D-psico-pyranose Following the procedure described for the preparation of Example 4, starting from 0.44 g (1.52 mmol) of the compound obtained in Example 14 and 0.40 g (1.69 mmol) of 72% 3-chloroperbenzoic acid, then purification by chromatography on silica gel (eluant: pentane/ethyl acetate, 1.5:1), 0.27 g (0.89 mro°»l) of the desired compound in the form of a white-coloured solid is obtained. Ykid: 58% Snectral characteristics: *H NMR (DMSO) 5 (ppm) : 1.40 (3H, s) ; 1.44 (6H, s); 2.22 (1H, d) ; 2.95 (1H, d) ; 3.35 (3H, s) ; 3.40 (3H, s); 3.60 (1H, d) ; 3.66 to 3.72 (2H, m) ; 3.92 (1H, d); 3.96 (1H, d) ; 4.40 (1H, s, exchangeable with D20); 4.56 (1H, d). Elemental analysis: (empirical formula: C14H24O7 M = 304.34) C H % found 55.92 7.99 % calc. 55.25 7.95 Example 16: l,2-0-Isopropylidene-3-(2-methyIoxiran-2-yl)-4-0-methyl-(3-D-psico-pyranose Following the procedure described for the preparation of Example 4, starting from 0.25 g (0.91 mmol) of the compound obtained in Example 2 and 0.34 g (1.44 mmol) of 72% 3-chloroperbenzoic acid, then purification by chromatography on silica gel (eluant: pentane/ethyl acetate, 2:1), 0.17 g (0.58 mmol) of the desired compound in the form of a white-coloured foam is obtained. Xisld: 63% Spectral characteristics: iH NMR (DMSO) 8 (ppm) : 1.35 (9H, s) ; 2.42 (1H, d) ; 2.75 (1H, d) ; 3.20 (3H, s) ; 3.50 (1H, s) ; 3.65 to 3.85 (3H, m) ; 4.10 (1H, s broad); 4.20 (1H, d) ; 4.95 (1H, s, exchangeable with D20); 5.15 (1H, d, exchangeable with D2O). Elemental analysis: (empirical formula : Ci3H2207 M = 290.31) C H % found 54.14 7.73 % calc. 53.78 7.64 25- 272890 Example 17 : l,2-0-Isopropylidene-2^5-hexodiulo-3-(2-methyloxiran-2-yl)-4-0-me£liyl-P-D-e/yf/jro-2,6-pyranose ) 0.70 g (1.86 mmol) of pyridinium dichromate is added to a solution of the compound obtained in Example 16 (0.22 g; 0.76 mmol) in 5 ml of anhydrous methylene chloride containing 0.50 g 5 of activated molecular sieve (0.4 nm). The whole is stirred at room temperature for 22 hours and then the reaction mixture is immediately chromatographed on silica gel (eluant: ethyl acetate/pentane, 2:1) to give 0.13 g (0.45 mmol) of the desired ketone in the form of a white-) coloured solid. Yield: 59% 10 Spectral characteristics: lH NMR (DMSO) 5 (ppm) : 1.45 (9H, s) ; 2.50 (1H, m) ; 2.80 (1H, d) ; 3.50 (3H, s); 3.85 (1H, d); 3.90 (1H, d); 4.20 (1H, d); 4.30 (1H, d); 4.50 (1H, s) ; 4.70 (1H, s, exchangeable with D2O). Elemental analysis: (empirical formula: C13H20O7 M = 288.30) 15 C H % found 53.77 7.05 % calc. 54.16 6.99 Example 18 : 5-0-(l-Imidazolylcarbonyl)-l,2-0-isopropylidene-3-(2-methyloxiran-2-yl)-4-O-methyl-P-D-psicopyranose 20 3.35 g (20.66 mmol) of carbonyldiimidazole are added in a single portion, under a nitrogen atmosphere and at room temperature, to a solution of the compound obtained in Example 16 (2.00 g; 6.89 mmol) in 40 ml of anhydrous methylene chloride. The reaction mixture is stirred at room temperature for 5 hours. The solvent is then evaporated off under reduced pressure | and the resulting solid residue is chromatographed on silica gel (eluant: ethyl acetate/pentane, 25 2:1). In this manner, 2.33 g (6.06 mmol) of the desired compound in the form of a white foam are obtained. Yield: 88% Snectral characteristics: *H NMR (DMSO) 5 (ppm): 1.40 (9H, 2s); 2.80 (1H, m); 2.84 (1H, d); 3.40 (3H, s); 3.82 30 (1H, d); 3.90 (1H, d) ; 4.02 (2H, m) ; 4.25 (1H, d); 4.45 (1H, s, exchangeable with D20); 5.50 (1H, s broad); 7.06 (1H, s); 7.65 (1H, s); 8.30 (1H, s). ■26- - n ri! ;> / 2 8 9 Elemental analysis: (empirical formula: Ci7H24N20g M = 384.39) C H N % found 53.04 6.30 7.05 % calc. 53.12 6.29 7.29 5 Example 19 : 5-0-{l-[4-((2,3,4-Trimethoxybenzyl)piperazinyl)]carbonyl}-l,2-0- isopropyIidene-3-(2-methyloxiran-2-yl)-4-C)-niethyl-p-D-psicopyranose 1.50 g (5.63 mmol) of 4-[(2,3,4-trimethoxybenzyl)piperazine] (TRIMETAZJLDlNE®) are added, at room temperature and under a nitrogen atmosphere, to a solution of the compound obtained in Example 18 (1.00 g; 2.60 mmol) in 6 ml of anhydrous methylene chloride. The 10 reaction mixture is stirred at room temperature for 17 hours and then the solvent is evaporated off under reduced pressure. The yellow-coloured oily residue that is obtained is purified on a column of silica gel (eluant: ethyl acetate). 1.15 g (1.97 mmol) of the desired product in the form of a white foam are isolated. Xkld: 75% 15 Spectral characteristics: !h NMR (DMSO) 8 (ppm): 1.40 (9H, 2s); 2.25 (4H, s broad); 2.43 (1H, m); 2.80 (1H, d); 3.35 (6H, m); 3.60 (1H, s, exchangeable with D2O); 3.70 (1H, m); 3.71 (3H, s) ; 3.75 (2H, m); 3.78 (9H, s); 3.90 (1H, d); 4.19 (1H, d); 5.15 (1H, d); 6.77 (1H, d) ; 6.96 (1H, d). Elemental analysis: (empirical formula: C28H42N2O1 \ M = 582.65) £ 20 C H N % found 57.69 7.16 4.72 % calc. 57.72 7.27 4.81 Example 20:5-0-[l-(4-Chloroacetylpiperazinyl)carboir/I]-l,2-0-isopropylidene-3-(2-methyloxiran-2-yl)-4-0-methyl-P-D-psicopyranose 25 1.5 g (2.74 mmol) of eerie ammonium nitrate are added at 0°C to a solution of the compound obtained in Example 19 (0.50 g ; 0.86 mmol) in 12 ml of an acetonitrile/water mixture (2:1). The reaction mixture is stirred for 2.5 hours, the temperature being allowed gradually to approach room temperature. After evaporation of the solvents, the residue is chromatographed on silica gel (eluant: methylene chloride/methanol/ammonia, 90:10:0.5). 0.16 g (0.40 mmol) 30 of debenzylated compound is obtained. To a solution of 0.15 g (0.37 mmol) of that compound in 5 ml of anhydrous methylene chloride containing 0.15 ml (0.11 g; 1.08 mmol) of anhydrous triethylamine there is added dropwise at 0°C, under a nitrogen atmosphere, 0.045 ml (0.064 g; *27~ I / t 0.56 mmol) of chloroacetic acid chloride. The reaction mixture is stirred at 0°C for 1 hour 45 minutes and then the whole is poured into an aqueous ammonium chloride solution (10%) cooled to 0°C. After customary treatment of the organic phase and then purification by I chromatography on silica gel (eluant: ethyl acetate), 0.086 g (0.18 mmol) of the desired 5 product in the form of a beige foam is obtained. Overall yield: 22% Spectral characteristics: lH NMR (DMSO) 8 (ppm): 1.40 (9H, 3s); 2.43 (1H, d) ; 2.80 (1H, d) ; 3.30 (3H, s); 3.40 I (8H, s broad); 3.80 (4H, m, of which 1 exchangeable with D20); 3.92 (1H, d); 4.20 (1H, d); 10 4.40 (2H, s); 5.18 (1H, s broad). Elemental analysis: (empirical formula: C20H31CIN2O9 M = 478.93) C H N CI % found 49.80 6.41 5.71 7.73 % calc. 50.16 6.52 5.85 7.40 15 Example 21: 5-0-[l-(4-Formylpiperazinyl)carbonyI]-l,2-0-isopropylidene-3-(2-inethyl-oxiran-2-yl)-4-0-methyl-f}-i>-psicopyranose This synthesis is carried out under the same operating conditions as those described for the preparation of Example 19, starting from 0.50 g of the compound obtained in Example 18 (1.30 mmol) and 0.40 ml (0.44 g; 3.88 mmol) of N-formylpiperazine in 5 ml of anhydrous ^^20 methylene chloride. 0.36 g (0.84 mmol) of the desired product in the form of a white-coloured powder is obtained. Ym- 64% Spectral characteristics: *H NMR (DMSO) 8 (ppm): 1.40 (9H, s) ; 2.48 (1H, d) ; 2.80 (1H, d) ; 3.30 (3H, s) ; 3.35 (8H, m); 3.70 to 3.85 (4H, m, of which 1H exchangeable with D2O); 3.92 (1H, d); 4.21 (1H, d); 5.20 (1H, s broad); 8.06 (1H, s). Elemental analysis: (empirical formula: C19H30N2O9 M = 430.46) C H N % found 52.95 6.99 6.51 30 % calc. 53.02 7.02 6.51 Example 22: 4,5-di-0-Chloroacetylcarbamoyl-l,2-0-isopropylidene-3-isopropenyl-f3-D-psicopyranose Following the procedure described for the preparation of Example 3, starting from 0.50 g (1.82 mmol) of the compound obtained in Example 1 and 0.50 ml (0.70 g; 5.87 mmol) of chloroacetyl isocyanate, then purification by chromatography on silica gel (eluant: ethyl acetate/pentane, 1:1), 0.90 g (1.80 mmol) of the desired product in the form of a white-coloured solid is obtained. Yield: 98% Spectral characteristics: *H NMR (DMSO) 5 (ppm): 1.30 (3H, s); 1.40 (3H, s); 1.75 (3H, s); 3.85 (2H, m) ; 4.15 (2H, m) ; 4.25 (1H, s, exchangeable with D2O); 4.30 (2H, s) ; 4.50 (2H, s) ; 5.15 (1H, s) ; 5.25 (2H, s) ; 5.30 (1H, s) ; 11.10 (1H, s, exchangeable with D20) ; 11.18 (1H, s, exchangeable with D20). Elemental analysis: (empirical formula: C18H24CI2N2O10 M = 499.30) C H N CI % found 43.70 4.84 5.56 14.24 % calc. 43.30 4.94 5.61 14.20 Example 23:4,5-di-0-Chloroacetylcarbamoyl-l,2-0-isopropylidene-3-(2-methyl-oxiran-2-yl)-p-D-psicopyranose Following the procedure described for the preparation of Example 4, starting from 0.30 g (0.60 mmol) of the product described in Example 22 and 0.17 g (0.72 mmol) of 72% 3-chloroperbenzoic acid, then purification by chromatography on silica gel (eluant: diethyl ether), 0.19 g (0.38 mmol) of the desired product in the form of a white-coloured foam is obtained. Yield: 63% Snectral characteristics: lU NMR (DMSO) 8 (ppm): 1.35 (3H, s); 1.41 (6H, 2s); 2.50 (1H + DMSO, s broad); 2.99 (1H, d) ; 3.72 (1H, d) ; 3.85 (1H, s) ; 4.00 (1H, s, exchangeable with D20); 4.12 (1H, d) ; 4.25 (1H, d); 4.40 (2H, s); 4.52 (2H, s); 5.20 (1H, s broad); 5.30 (1H, s broad) ; 11.06 (1H, s, exchangeable with D20); 11.20 (1H, s, exchangeable with D20). Elemental analysis: (empirical formula : CjgHo^C^NoOi ] M = 515.30) C H N CI % found 41.78 4.83 5.26 14.04 % calc. 41.96 4.69 5.44 13.76 -29- 2/28! Example 24 :5-0-Phenylcarbamoyl-l,2-0-isopropylidene-3-(2-methyloxiran-2-yl)-4-O-methyl-P-D-psicopyranose The title compound is obtained starting from the compound described in Example 2, in accordance with the procedure described in Example 3, by replacing chloroacetyl isocyanate with phenyl isocyanate and then carrying out the oxidation described in Example 4. Elemental analysis: (empirical formula : C20H27NO8 M = 409.44) C H N % found 58.95 6.39 3.48 % calc. 58.67 6.65 3.42 10 Example 25 : l,2-0-Isopropylidene-3-isopropenyl-3,4-di-0-methyl-p-D-psicopyranose Step A : 5-0-terL-butyldimethylsilyl-l,2-0-isopropylidene-3-isopropenyk3,4-di-0-methyl-P-D-psicopyranose 1.24 g (18.21 mmol) of imidazole and 1.92 g (12.73 mmol) of tert.-butyldimethylsilyl chloride are added in succession to a solution, cooled to 0°C, of 2.00 g (7.29 mmol) of the compound 15 obtained in Example 2 in 10 ml of anhydrous N,N-dimethylformamide. The whole is stirred for 72 hours, the temperature being allowed to approach room temperature. The intermediate product is isolated and purified by chromatography on silica gel (eluant: petroleum ether/ethyl | acetate, 4:1) to give 2.72 g (7.00 mmol) of the desired compound in the form of a white-coloured solid. A solution of that product (1.18 g; 3.04 mmol) in 5 ml of anhydrous 20 tetrahydrofuran is added to a suspension of sodium hydride (0.22 g; 5.50 mmol) in 6 ml of anhydrous tetrahydiofuran. The whole is stirred under a nitrogen atmosphere at reflux of the solvent for 55 minutes, and 1.15 ml (2.62 g; 18.47 mmol) of methyl iodide are added. The reaction mixture is heated at reflux of the tetrahydrofuran for a further 1.5 hours and then the whole is poured into an aqueous ammonium chloride solution (10%) cooled to 0°C. After 25 customary treatment of the organic phase and purification by chromatography on silica gel (eluant: methylene chloride), 0.86 g (2.14 mmol) of the desired compound in the form of a white-coloured foam is obtained. XkM: 67% Spectral characteristics: 30 lH NMR (DMSO) 5 (ppm) : 0.10 (6H, s) ; 0.30 (9H, s); 1.20 (3H, s); 1.30 (3H, s) ; 1.70 (3H, s); 3.30 (3H, s); 3.35 (3H, s); 3.50 to 3.60 (2H, m); 3.65 (1H, d); 3.70 (1H, d); 4.10 (1H, d) ; 4.20 (1H, s broad); 5.00 (1H, s broad); 5.20 (1H, s). CI cot Step B : 1,2-0-isopropylidene-3-isopropenyl-3,4-di-O-methyl-(J-D-psicopyranose 6.S ml of a solution (1 M in tetrahydrofuran) of tetrabutylammonium fluoride (6.S0 mmol) are added rapidly to a solution, cooled to 0°C, of the compound obtained in the preceding step (0.8S g; 2.11 mmol) in 6 ml of anhydrous tetrahydrofuran. The whole is stirred for S hours, the temperature being allowed to approach room temperature. After customary treatment of the organic phase and purification by chromatography on silica gel (eluant: pentane/diethyl ether, 1:1), 0.60 g (2.09 mmol) of the desired compound in the form of a colourless oil is obtained. Yield: 99% Spectral characteristics: *H NMR (DMSO) 8 (ppm): 1.30 (3H, s); 1.40 (3H, s); 1.90 (3H, s) ; 3.30 (3H, s); 3.40 (3H, s) ; 3.65 to 3.75 (3H, m) ; 3.80 (IH, dxd) ; 4.20 (IH, m) ; 4.30 (2H, m, of which 1 exchangeable with D20) ; 5.00 (IH, s broad); 5.30 (IH, s broad). Example 26: 5-0-Chloroacetylcarbamoyl-l,2-0-isopropylidene-3-isopropenyl-3,4-di-O-methyl- p-D-psicopyranose Following the procedure described for the preparation of Example 3, starting from 0.10 g (0.35 mmol) of the compound obtained in Example 25 and 0.05 ml (0.07 g; 0.59 mmol) of chloroacetyl isocyanate, purification by chromatography on silica gel (eluant: diethyl ether) yields 0.14 g (0.34 mmol) of the desired product in the form of a white-coloured foam. Yield: 97% Spectral characteristics: NMR (DMSO) 8 (ppm): 1.30 (3H, s); 1.40 (3H, s); 1.90 (3H, s) ; 3.30 (3H, s); 3.40 (3H, s); 3.75 (IH, d); 3.80 (IH, d); 3.95 (IH, u); 4.00 (IH, d); 4.25 (IH, d); 4.45 (2H, s); 5.05 (IH, s); 5.35 (IH, s); 5.40 (IH, s broad); 11.10 (IH, s, exchangeable with D20). Example 27: l,2-0-Isopropylidene-3,4-di-0-methyl-3-(2-methyloxiran-2-yl)-p-D-psicopyranose Following the procedure described for the preparation of Example 4, starting from 0.27 g (0.94 mmol) of the product described in Example 25 and 0.81 g (3.38 mmol) of 72% 3-chloroperbenzoic acid, then purification by chromatography on silica gel (eluant: diethyl ether), 0.25 g (0.82 mmol) of the desired product in the form of a white-coloured solid is obtained. Yield: 87% 31 7280 Spectral characteristics: *H NMR (DMSO) 5 (ppm): 1.40 (9H, 2s); 2.45 (IH, d); 2.90 (IH, d); 3.35 (6H, 2s); 3.60 (IH, d) ; 3.65 (IH, dd) ; 3.85 (IH, d) ; 3.90 (IH, dd) ; 4.00 (IH, m) ; 4.40 (IH, d, exchangeable with D20); 4.55 (IH, d). 5 Example 28: 5-0-Chloroacetylcarbamoyl-l,2-0-isopropylidene-3,4-di-0-methyl-3-(2-methyloxfran-2-yl)-P-D-psicopyranose Following the procedure described for the preparation of Example 3, starting from 0.23 g (0.75 mmol) of the product obtained in Example 27 and 0.08 ml (0.11 g; 0.94 mmol) of chloroacetyl isocyanate, then purification by chromatography on silica gel (eluant: methylene 10 chloride/ethyl acetate, 4:1), 0.25 g (0.59 mmol) of the desired product in the form of a white-coloured foam is obtained. Yield: 78% iH NMR (DMSO) 5 (ppm): 1.35 (9H, 2s); 2.50 (IH, d); 2.80 (IH, d); 3.35 (6H, 2s); 3.60 15 (IH, d); 3.72 (2H, 2d); 4.00 (IH, d); 4.40 (2H, s); 4.55 (IH, d); 5.35 (IH, s broad); 11.02 (1H, s, exchangeable with D20). Elemental analysis: (empirical formula: C17H26CINO9 M = 423.85) C H N CI % found 49.84 6.41 3.23 8.26 % calc. 48.17 6.18 3.30 8.37 Example 29: 3-Isopropenyl-4^-di-0-methyl-P-D-psicopyranose | Following the procedure described for the preparation of Example 9, starting from 1.00 g (3.47 mmol) of the compound obtained in Example 14 and 25 g of acidic resin (DOWEX 50X8-100) heated in 50 ml of water, then purification by chromatography on silica gel 25 (eluant: diethyl ether then ethyl acetate), 0.59 g (2.38 mmol) of the desired product in the form of a white-coloured solid is obtained. Xield: 68% Spectral characteristics: iH NMR (DMSO) 8 (ppm): 1.75 (3H, s); 3.30 (3H, s); 3.35 (IH, m); 3.52 (3H, s); 3.55 30 (IH, dd) ; 3.70 to 3.90 (4H, m) ; 4.30 (IH, s, exchangeable with D20) ; 4.50 (IH, t, exchangeable with D20) ; 4.86 (IH, s); 5.10 (IH, s); 5.40 (IH, s, exchangeable with D20). -32- O 0 O (Hi Example 30: l"para-ToIuenesu]phonyl-3-isopropenyl-4,5-di-0-methyl-P-D-psico-pyranose 1 Following the procedure described for the preparation of Example 10, starting from 0.80 g (3.22 mmol) of the compound obtained in Example 29 and 1.S3 g of tosyl chloride in IS ml of 5 anhydrous pyridine, then purification by chromatography on silica gel (eluant: diethyl ether/pentane, 2:1), 0.92 g (2.28 mmol) of the desired product in the form of a white-coloured foam is obtained. I Yield: 70% Spectral characteristics: 10 lU NMR (DMSO) 8 (ppm): 1.62 (3H, s); 2.40 (3H, s) ; 3.22 (3H, s); 3.34 (3H, s); 3.68 (IH, d); 3.75-3.85 (3H, m) ; 3.90 (IH, d); 3.98 (IH, d); 4.40 (IH, s, exchangeable with D2O) ; 4.81 (IH, s broad); 4.95 (IH, d); 6.46 (IH, s, exchangeable with D2O); 7.45 (2H, d); 7.71 (2H, d). Example 31: l-Desoxy-l-iodo-3-isopropenyl-4^-di-0-methyl-P-D-psicopyranosfc Following the procedure described for the preparation of Example 12, starting from 0.10 g (0.25 mmol) of the compound obtained in Example 30 and 0.18 g (1.20 mmol) of sodium iodide in 3 ml of acetone at room temperature, then purification by chromatography on silica gel (eluant: diethyl ether/pentane, 1.5:1), 0.079 g (0.22 mmol) of the desired product in the form of a pale-yellow-coloured solid is obtained. Yield: 88% Spectral characteristics: lH NMR (DMSO) 8 (ppm): 1.76 (3H, s); 3.25 (4H, s + d); 3.40 (3H, s); 3.64 (IH, d) ; 3.75 to 3.95 (4H, m) ; 4.50 (IH, s, exchangeable with D2O) ; 4.95 (IH, s broad) ; 5.15 (IH, s broad); 5.98 (IH, s, exchangeable with D2O). 25 Example 32 : (lS,6/?,7i?^/J)-8-Isopropenyl-6,7-dlmethoxy-l,4-dioxaspiro[2^]octan-8-oI 2.20 g (9.49 mmol) of silver(I) oxide are added in portions, over a period of 48 hours, to a solution of the compound obtained in Example 31 (0.52 g; 1.45 mmol) in 5 ml of dioxane. The reaction mixture is then filtered and the filtrate is evaporated to give 0.32 g (1.39 mmol) of the desired product in the form of a white solid. 30 Yield: 93% -33- 272890 Spectral characteristics: !h NMR (DMSO) 8 (ppm): 1.72 (3H, s); 2.71 (2H, s) ; 3.40 (6H, 2s); 3.70 (IH, dd); 3.79 to 3.90 (2H, m); 3.95 (IH, dd) ; 4.70 (IH, s, exchangeable with D20); 5.00 (IH, s broad); 5.20 (lH,s broad). Elemental analysis: (empirical formula: Cj iH 18O5 M = 230.26) C H % found 57.20 7.89 % calc. 57.38 7.88 Example 33: 5-0-ChloroethylcarbamoyM,2-0-isopropylidene-3-isopropenyl-4-0-methy 1- P-D-psicopy ranose Following the procedure described for the preparation of Example 3, starting from 1.00 g (3.64 mmol) of the compound obtained in Example 2 and 0.46 ml (0.57 g; 5.40 mmol) of chloroethyl isocyanate, 1.35 g (3.55 mmol) of the desired product in the form of a white-coloured solid are obtained. Yield: 97% Spectral characteristics: *H NMR (DMSO) 8 (ppm): 1.30 (3H, s); 1.35 (3H, s); 1.80 (3H, s); 3.25 (3H, s); 3.32 (2H, m); 3.61 (2H, m); 3.72 (IH, d); 3.78 (2H, m); 3.90 (IH, s, exchangeable with D20); 3.95 (IH, d); 4.12 (IH, d) ; 5.08 (IH, s) ; 5.25 (IH, s broad) ; 5.28 (IH, s broad) ; 7.75 (IH, t, exchangeable with D2O). Example 34: 5-0-Chloroethylcarbamoyl-l,2-0-isopropylidene-3-(2-inethyloxiran-2-yl)-4-0-methyl-P-D-psicopyranose Following the procedure described for the preparation of Example 4, starting from 0.25 g (0.66 mmol) of the compound obtained in Example 33 and 0.17 g (0.71 mmol) of 12% 3-oriloroperbenzoic acid, then purification by chromatography on silica gel (eluant: diethyl eiher), 0.16 g (0.40 mmol) of the desired compound in the form of a white-coloured foam is obtained. Yield: 60% Spectral characteristics: 1h NMR (DMSO) 8 (ppm): 1.40 (9H, s); 2.42 (IH, d); 2.81 (IH, d); 3.30 (5H, s); 3.60 to 3.75 (4H, m, of which IH exchangeable with D2O) ; 3.80 (IH, d); 3.90 (IH, d); 4.20 (IH, d) ; 5.20 (IH, s broad); 7.60 (IH, t, exchangeable with D20). -34- 272890 Elemental analysis: (empirical formula: CigH^ClNOs M = 395.84) C H N CI % found 48.34 6.43 3.68 9.27 % calc. 48.55 6.62 3.54 8.96 Example 35: 5-0-(2,4-Difluorophenylcarbamoyl)-l,2-0-isopropylldene-3-isopropenyl-4-O-methyl-P-D-psicopyranose Following the procedure described for the preparation of Example 3, starting from 0.50 g (1.82 mmol) of the compound obtained in Example 2 and 0.43 ml (0.56 g; 3.63 mmol) of 2,4-difluorophenyl isocyanate, then purification by chromatography on silica gel (eluant: pentane/diethyl ether, 4:1), 0.75 g (1.75 mmol) of the desired product in the form of a white-coloured solid is obtained. Yield: 96% Spectral characteristics: NMR (DMSO) 8 (ppm): 1.30 (3H, s); 1.40 (3H, s); 1.85 (3H, s); 3.30 (3H, s); 3.80 (2H, s) ; 3.82 (IH, d) ; 4.00 (IH, d) ; 4.10 (IH, s, exchangeable with D20) ; 4.15 (IH, d) ; 5.08 (IH, s broad); 5.30 (IH, s broad); 5.40 (IH, s broad); 7.05 (IH, txd); 7.31 (IH, txd) ; 7.81 (IH, m); 9.70 (IH, s, exchangeable with D20). Example 36: 5-0-(2,4-Difluorophenylcarbamoyl)-l,2-0-isopropylidene>3-(2-methyl-oxiran-2-yl)-4-0-methyl-p-D-psicopyranose Following the procedure described for the preparation of Example 4, starting from 0.72 g (1.67 mmol) of the compound obtained in Example 35 and 0.45 g (1.88 mmol) of 72% 3-chloroperbenzoic acid, then purification by chromatography on silica gel (eluant: diethyl ether/petroleum ether, 1:1), 0.32 g (0.72 mmol) of the desired compound in the form of a white-coloured foam is obtained. Yield: 43% Snectral characteristics: !h NMR (DMSO) 8 (ppm): 1.40 (9H, s) ; 2.45 (IH, d) ; 2.82 (IH, d) ; 3.36 (3H, s) ; 3.80 (IH, d) ; 3.82 (2H, s) ; 3.95 (IH, s, exchangeable with D2O) ; 4.00 (IH, d) ; 4.25 (IH, d) ; 5.30 (IH, s broad); 7.05 (IH, txd); 7.30 (IH, txd); 7.80 (IH, m); 9.50 (IH, s, exchangeable with D2O). -35- o a ) Elemental analysis: (empirical formula: C20H25F2NO8 C H N % found 53,65 5.42 3.16 % calc. 53.93 5.66 3.14 M = 445.42) Example 37: 5-0-(3-TrifluoromethyIphenyIcarbanioyl)-l,2-0-isopropyIidene-3-(2-methyloxiran-2-yl)-4-0-methyl-P-D-psicopyranose Following the procedure described for the preparation of Example 3, starting from 0.25 g (0.86 mmol) of the compound obtained in Example 2 and 0.25 ml (0.34 g; 1.82 mmol) of 3-trifluoromethylphenyl isocyanate, then oxidation in accordance with the procedure described in Example 4, and finally purification by chromatography on silica gel (eluant: pentane/ethyl acetate, 4:1), 0.23 g (0.50 mmol) of the desired compound in the form of a white-coloured foam is obtained. Overall yield: 58% Spectral characteristics: NMR (DMSO) 5 (ppm): 1.40 (9H, s) ; 2.45 (IH, d) ; 2.82 (IH, d); 3.40 (3H, s) ; 3.60 (IH, s, exchangeable with D2O); 3.80 (3H, d + s); 4.00 (IH, d); 4.25 (IH, d); 5.46 (IH, s broad) ; 7.32 (IH, d); 7.53 (IH, t) ; 7.65 (IH, d); 7.92 (IH, s); 10.03 (IH, s, exchangeable with D20). Elemental analysis: (empirical formula: C21H26F3NO8 M = 477.43) C H N % found 53.33 5.34 3.17 % calc. 52.83 5.49 2.93 Example 38: 5-0-(l-Naphthylcarbamoyl)-l,2-0-isopropylidene-3-(2-methyloxiran-2-yl)-4-0-methyl-P-D-psicopyranose Following the procedure described for the preparation of Example 3, starting from 0.25 g (0.86 mmol) of the compound obtained in Example 2 and 0.26 ml (0.30 g; 1.79 mmol) of 1-naphthyl isocyanate, then oxidation in accordance with the procedure described in Example 4, and finally purification by chromatography on silica gel (eluant: methylene chloride/ethyl acetate, 4:1), 0.18 g (0.39 mmol) of the desired compound in the form of a white-coloured solid is obtained. Overall yield: 45% -36- %'/2$ Spectral characteristics: 1h NMR (DMSO) 8 (ppm) : 1.42 (9H, s); 2.49 (IH, d) ; 2.85 (IH, d) ; 3.40 (3H, s) ; 3.85 (4H, m, of which IH exchangeable with D2O) ; 4.00 (IH, d) ; 4.26 (IH, d) ; 5.36 (IH, s broad) ; 7.45 to 7.60 (3H, m) ; 7.72 (2H, q) ; 7.95 (1H, m) ; 8.15 (IH, m) ; 9.62 (IH, s, exchangeable with D20). Elemental analysis: (empirical formula: C24H29NOg M = 459.50) C H N % found 62.23 6.30 3.20 % calc. 62.73 6.36 3.05 Example 39 : l,2-Q-Isopropylidene-3-0-allyI-P-D-fructopyranose Step A : l,2:4,5-di-0-isopropylidene-3-0-allyl-|$-D-fructopyranose 10.00 g (38.42 mmol) of l,2:4,5-di-0-isopropylidene-(5-D-fructopyranose, in solution in 20 ml of anhydrous N,N-dimethylformamide, are added dropwise, at room temperature, to a suspension of sodium hydride (60% in oil; 2.30 g; 57.50 mmol) in 60 ml of anhydrous N,N-dirnethylformamide. The reaction mixture is stirred at room temperature for 2 hours, and 6.70 ml (9.37 g; 77.45 mmol) of allyl bromide are added dropwise thereto. After 75 minutes' stirring at room temperature, the reaction mixture is poured into 100 ml of an aqueous ammonium chloride solution (10%) cooled to 0°C. Customary treatment of the organic phase and then purification by chromatography on silica gel (eluant: pentane/diethyl ether, 8:1) yield 9.88 g (32.89 mmol) of the desired product in the form of a yellow-coloured oil. Yislsi: 85% Step B : l,2-0-isopropylidene-3-0-allyl-f}-D-fructopyranose Following the procedure described for the preparation of Example 1, step C, starting from 9.30 g (30.96 mmol) of the compound obtained in the preceding step, then purification by chromatography on silica gel (eluant: ethyl acetate/diethyl ether, 2:1), 6.04 g (23.20 mmol) of the desired product in the form of a white-coloured solid are obtained. Yield: 75% Spectral characteristics: NMR (DMSO) 8 (ppm) : 1.30 (3H, s); 1.35 (3H, s) ; 3.40 (IH, d) ; 3.50 (IH, d) ; 3.65 (2H, m) ; 3.70 (2H, d) ; 3.90 (IH, d) ; 4.03 (IH, dxd) ; 4.35 (IH, dxd) ; 4.70 (IH, d, exchangeable with D2O); 4.82 (IH, d, exchangeable with D2O); 5.10 (IH, d); 5.25 (IH, d); 5.90 (IH, txdxd). -37- Exatnple 40: l,2-0-IsopropyIidene-3-0-allyl-4-0-methyl-P-D-fructopyranose Following the procedure described for the preparation of Example 2, starting from 1.00 g (3.84 mmol) of the compound obtained in Example 39 and 1.91 g of dibutyltin (7.67 mmol) at reflux for 48 hours in 30 ml of methanol and then using the intermediate formed in that reaction and subjecting it to the action of 1.20 ml (2.74 g; 19.27 mmol) of methyl iodide at reflux of dioxane (20 ml) for 60 hours, 0.92 g (3.35 mmol) of the desired compound in the form of a white-coloured foam is isolated after chromatography on silica gel (eluant: pentane/ethyl acetate, 2:1). Yield: 87% Spectral characteristics: *H NMR (DMSO) 8 (ppm): 1.28 (3H, s); 1.38 (3H, s) ; 3.30 (3H, s); 3.32 (IH, dxd); 3.52 (2H, d+s) ; 3.70 (IH, d) ; 3.80 (IH, d) ; 3.92 (2H, m) ; 4.00 (IH, d) ; 4.28 (IH, dxd) ; 4.73 (IH, d, exchangeable with D20); 5.10 (IH, d); 5.21 (IH, d); 5.90 (IH, txdxd). Example 41: 1^2-0-IsopropyHdene-3-0-[(2SjR)-(2:3-epoxypropyl)]-4-0-methyl-P-D-fructopyranose Following the procedure described for the preparation of Example 4, starting from 1.18 g (4.30 mmol) of the compound obtained in Example 40 and 1.90 g (8.03 mmol) of 72% 3-chloroperbenzoic acid, then purification by chromatography on silica gel (eluant: diethyl ether), 0.53 g (1.82 mmol) of the desired diastereoisomeric mixture is obtained. Yield: 42% (mixture of the two diastereoisomers) Spectral characteristics: !h NMR (DMSO) 8 (ppm): 1.30 (3H, s) ; 1.40 (3H, s) ; 2.50 (IH, m); 2.80 (IH, m); 3.10 (IH, m); 3.30 (7H, m); 3.40 (IH, m) ; 3.70 (2H, m); 3.80 (IH, m); 4.00 (IH, d); 4.70 (IH, d, exchangeable with D20) Example 42: 5-0-ChIoro8':etylcarbainoyl-l,2-0-isopropyHdene-3-[(2S)-(2:3-epoxypro- pyl)]-4-0-methy!-f}-D-fructopyranose and 5-0-Chloroacetylcarbamoyl-l,2-0-isopropylidene-3-[(2/?)-(2:3-epoxypropyl)]-4-0-methyI-^>-fructopyranose Diastereoisomer A Diastereoisomer B -38- 27289 Following the procedure described for the preparation of Example 3, starting from 0.50 g (1.72 mmol) of the mixture of diasiereoisomers obtained in Example 41 and 0.25 ml (0.35 g; 2.93 mmol) of chloroacetyl isocyanate, then purification by chromatography (HPLC, Kromasil 100-5C18 column, eluant: acetonitrile/water, 3:7), 0.189 g (0.46 mmol) of the desired 5 diastereoisomer A and 0.164 g (0.40 mmol) of diastereoisomer B, both in the form of a white-coloured foam, are obtained. Yield: diastereoisomer A : 27 % diastereoisomer B : 23% Spectral characteristics Diastereoisomer A : *H NMR (DMSO) 8 (ppm) : 1.32 (3H, s) ; 1.40 (3H, s) ; 2.54 (IH, dxd) ; 2.72 (IH, t); 3.10 10 (IH, txd); 3.28 (3H, s) ; 3.29 (IH, m); 3.50 (IH, d); 3.60 (IH, dxd) ; 3.70 (IH, dxd) ; 3.85 (2H, d+s); 4.05 (2H, d+s); 4.41 (2H, s); 5.29 (IH, s broad); 11.01 (IH, s, exchangeable with D20). Spectral characteristics Diastereoisomer B : *H NMR (DMSO) 8 (ppm): 1.32 (3H, s); 1.41 (3H, s) ; 2.60 (IH, m) ; 2.70 (IH, m); 3.10 15 (IH, m); 3.29 (3H, s); 3.50 (IH, d); 3.58 (IH, dxd); 3.70 (IH, dxd); 3.70 to 3.75 (2H, m); 3.80 to 3.85 (2H, m) ; 4.10 (IH, d) ; 4.42 (2H, s) ; 5.25 (IH, s broad) ; 11.00 (IH, s, exchangeable with D20). Elemental analysis: (empirical formula: Ci6H24C1N09 M = 409.82) C H N CI 20 % calc. 46.89 5.90 3.42 8.65 Diastereoisomer A % found 46.85 5.90 3.27 8.83 Diastereoisomer B % found 47.33 5.96 3.32 8.59 Example 43 : l,2-0-Isopropylidene-3-(5-methylhex-l-enyl-P-i>-psicopyranose Step A : 1,2:4,5-di-0-isopropylidene-3-(5-methylhex-l-enyI)-p-D-psicopyranose 25 18 ml of n-butyllithium (2.5 molar in hexane, i.e. 45.00 mmol) are added dropwise, under a nitrogen atmosphere, to a solution, cooled to -78°C, of 6.55 ml of 5-methylhex-l-yne (4.83 g; 50.26 mmol) in 30 ml of anhydrous tetrahydrofuran. The whole is stirred at -78°C for 15 minutes and then at 0°C for 30 minutes. The solution is then added dropwise to a solution, cooled to -78°C, of l,2:4,5-di-0-isopropylidene-P-D-cry//iro-2,3-hexodiulo-2,6-pyranose 30 (described in Example 1, step A; 6.50 g; 25.17 mmol) in 140 ml of anhydrous toluene. After 2 hours' stirring at -78°C, the reaction mixture is poured into a 10% aqueous ammonium chloride solution (150 ml) cooled to 0°C. Customary treatment of the organic phase yields 8.60 g of l,2:4,5-di-0-isopropylidene-3-(5-methylhex-l-ynyl)-j3-D-psicopyranose in the form of an oily residue, which is used for the following step without being purified. -39- 27? 89 Hydrogenation of a solution of 3.07 g (8.66 mmol) of that compound in 120 ml of benzene in the presence of 0.82 g of Lindlar catalyst for 1.5 hours yields, after filtration, evaporation and chromatography on silica gel (eluant: pentane/ethyl acetate, 20:1), the desired compound (2.41 g; 6.76 mmol) in the form of a colourless oil. Yield: 75% StepB : 1,2-0-isopropylidene-3-(5-methylhex-1 -enyl)-(i-D-psicopyranose Following the procedure described for the preparation of Example 1 (step C), starting from 2.25 g (6.31 mmol) of the compound obtained in the preceding step, then evaporation of the 25 ml of acetic acid/water mixture, 4:1, 1.98 g (6.26 mmol) of the desired product in the form of a colourless oil are obtained. Yield: 99% Spectral characteristics: JH NMR (DMSO) 8 (ppm) : 0.85 (6H, d) ; 1.20 (2H, m) ; 1.30 (3H, s) ; 1.40 (3H, s); 1.51 (IH, o) ; 2.40 (2H, txd); 3.50 (IH, dxd); 3.68 (IH, dxd); 3.81 (3H, m); 4.00 (IH, d); 4.58 (IH, d, exchangeable with D20); 4.90 (IH, s, exchangeable with D20); 5.15 (IH, d); 5.45 (IH, m); 5.75 (IH, d, exchangeable with D2O). Example 44: l,2-0-Isopropylidene-3-(5-methylhex-l-enyl)-4-0-methyl-p-D-psicopy-ranose Following the procedure described for the preparation of Example 2, starting from 1.98 g (6.26 mmol) of the compound obtained in Example 43 and 3.15 g of dibutyltin (12.65 mmol) at reflux for 4 hour* in 60 ml of methanol, and then using the intermediate formed in that reaction and subjecting it to the action of 6.50 ml (14.82 g; 104.41 mmol) of methyl iodide at reflux of dioxane (50 ml) for 37 hours, and after purification by chromatography on silica gel (eluant: pentane/diethyl ether, 3:1), 1.37 g (4.15 mmol) of the desired compound in the form of a white-coloured foam are obtained. Yield: 66% Spectral characteristics: *H NMR (DMSO) 8 (ppm) : 0.85 (6H, d) ; 1.18 (2H, m) ; 1.30 (3H, s) ; 1.40 (3H, s); 1.50 (IH, o); 2.40 (2H, m); 3.16 (IH, d); 3.30 (3H, s); 3.72 (IH, dxd); 3.82 (2H, m); 3.95 (IH, d); 4.06 (IH, m) ; 5.15 (IH, s, exchangeable with D20); 5.18 (IH, d); 5.45 (IH, m); 5.90 (IH, d, exchangeable with D2O). -40- 272 39 Example 45: l^-0-Isopropylidene-3-[(25r3S)-(3-isopentyloxiran-2-yI)]-4-0-methyl-P-D-psicopyranose and l,2-0-isopropylidene-3-[(2R,31?M3-isopentyloxiran-2-yl)]-4-0-methyl-P-D-psicopyranose HO CH3 Diastereoisomer A Diastereoisomer B Following the procedure described for the preparation of Example 4, starting from 1.31 g (3.96 mmol) of the compound obtained in Example 44 and 1.71 g (7.23 mmol) of 3-chloroperbenzoic acid, then purification by chromatography on silica gel (eluant: diethyl ether/pentane, 2:1), 0.69 g (1.99 mmol) of diastereoisomer A (Rf = 0.30) and 0.36 g (1.04 mmol) of diastereoisomer B (Rf = 0.10), both in the form of a white-coloured foam, are obtained. Yield: diastereoisomer A : 50% diastereoisomer B : 26% Spectral characteristics Diastereoisomer A : NMR (DMSO) 8 (ppm): 0.85 (6H, d) ; 1.28 (2H, m) ; 1.30 (3H, s); 1.40 (3H, s); 1.55 (IH, o); 1.80 (IH, m); 2.00 (IH, m); 2.80 (IH, txd) ; 2.90 (IH, d); 3.30 (IH, d); 3.35 (3H, s); 3.72 (IH, d); 3.75 (IH, m); 3.82 (IH, d); 4.10 (IH, s broad); 4.40 (IH, d); 4.96 (IH, s, exchangeable with D20); 5.93 (IH, d, exchuflgeable with D20). Soectral characteristics Diastereoisomer B : iH NMR (DMSO) 8 (ppm): 0.85 (6H, d) ; 1.30 (2H, m) ; 1.30 (3H, s); 1.40 (3H, s); 1.55 (IH, o) ; 1.66 (IH, m); 1.76 (IH, m); 2.72 (IH, m); 2.90 (IH, d); 3.40 (3H, s); 3.45 (IH, d) ; 3.70 (IH, dxd) ; 3.80 (IH, dxd) ; 3.81 (IH, d) ; 4.02 (IH, m) ; 4.10 (IH, d) ; 4.95 (IH, s, exchangeable with D20); 5.45 (IH, d, exchangeable with D20). -41 - 27289 ExamBlsJfi: 5-0-chloroncetylcarbamoyl-l,2-0-isopropylidene-3-[(2S,3SM3-iso-pentyloxiran-2-yl)]-4-0-methyl-P-D-psicopyranose and 5-O-chloro-acetylcarbamoyl-l,2-0-isopropylidene-3-[(2it,3JtH3-isopentyloxiran-2-yl)]-4-0-methyl-P-i>-pslcopyranose V u u N I H "CH3 Diastereoisomer A U CHj Diastereoisomer B Following the procedure described for the preparation of Example 3, starting from 0.144 g (0.41 mmol) of diastereoisomer A obtained in Example 45 and 0.06 ml (0.08 g; 0.70 mmol) of chlorcacetyl isocyanate, then purification by chromatography on silica gel (eluant: diethyl ether/pentane, 1:1), 0.175 g (0.37 mmol) of the desired compound in the form of a white-coloured solid is obtained. Diastereoisomer B is obtained in accordance with the same procedure starting from diastereoisomer B obtained in Example 45. Yield: diastereoisomer A : 90% diastereoisomer B : 86% Spectral characteristics Diastereoisomer A : *H NMR (DMSO) 5 (ppm) : 0.85 (6H, d); 1.30 (5H, m) ; 1.40 (3H, s) ; 1.55 (IH, o); 1.80 (IH, m); 2.00 (IH, dxdxd) ; 2.80 (IH, m) ; 2.95 (IH, d) ; 3.30 (3H, s); 3.60 (IH, d); 3.80 (IH, d) ; 3.88 (IH, s, exchangeable with D2O) ; 3.98 (IH, d); 4.41 (2H, d); 4.50 (2H, s) ; 5.30 (IH, s broad); 11.10 (IH, s, exchangeable with D20). Elemental analysis: (empirical formula: C20H32CINO9 C H % calc. 51.56 6.92 Diastereoisomer A % found 51.22 7.01 Diastereoisomer B % found 51.47 7.00 M = 465.93) N CI 3.01 7.61 3.04 7.97 3.03 8.27 Example 47: 5-0-Ethoxycarbonylcarbamoyl-l,2-0-isopropylidene-3-[(2S*,3S*)-3-isopentyloxiran-2-yl)]-4-0-methyl-P-D-psicopyranose Following the procedure described for the preparation of Example 3, starting from 0.15 g (0.43 mmol) of diastereoisomer A obtained in Example 45 and 0.06 ml (0.08 g; 0.69 mmol) of -42- 27289 ethoxycarbonyl isocyanate, then purification by chromatography on silica gel (eluant: pentane/diethyl ether, 1:1), 0.19 g (0.41 mmol) of the desired compound in the form of a white-coloured solid is obtained. iisld: 95% Spectral characteristics: iH NMR (DMSO) 8 (ppm) : 0.86 (6H, d) ; 1.20 (3H, t) ; 1.32 (2H, m) ; 1.33 (3H, s); 1.35 (3H, s) ; 1.55 (IH, m) ; 1.70 to 2.10 (IH, m) ; 2.80 (IH, m) ; 2.95 (IH, dd) ; 3.35 (3H, s) ; 3.56 (IH, d); 3.76 (2H, m); 3.96 (3H, m, of which IH exchangeable with D20); 4.08 (2H, q) ; 4.43 (IH, d); 5.28 (IH, m); 10.62 (IH, s, exchangeable with D20). Elemental analysis: (empirical formula: C21H35NO10 M = 461.51) C H N % found 54.61 7.52 2.94 % calc. 54.65 7.64 3.03 Example 48: 5-0-Ethyloxycarbonylinethyl-l,2-0-kopropyHdene-3-[(2S*,3S*)-iso-pentyloxiran-2-yl]-4-0-methyl-(3-D-psicopyranose Following the procedure described for the preparation of Example 3, starting from 0.15 g (0.43 mmol) of diastereoisomer A obtained in Example 45 and 0.06 ml (0.08 g; 0.66 mmol) of ethyl isocyanatoacetate, then purification by chromatography on silica gel (eluant: pentane/diethyl ether, 1:1), 0.17 g (0.36 mmol) of the desired compound in the form of a white-coloured solid is obtained. YifiM:83% Spectral characteristics: !H NMR (DMSO) 8 (ppm) : 0.88 (6H, d) ; 1.21 (3H, t) ; 1.30 (2H, m) ; 1.35 (3H, s); 1. 42 (3H, s); 1.56 (IH, m); 1.80 (IH, m); 1.95 (IH, m); 2.82 (IH, m); 2.98 (IH, d); 3.32 (3H, s) ; 3.55 (IH, d); 3.68 (2H, dd, of which IH exchangeable with D20); 3.80 (3H, m); 3.94 (IH, d); 4.10 (2H, q); 4.43 (IH, d); 5.15 (IH, s broad); 7.95 (IH, t, exchangeable with D2O). Elemental analysis: (empirical formula: C22H37NOio M = 475.54) C H N % found 55.50 7.68 2.97 % calc. 55.57 7.84 2.95 -43- 272 Example 49: 5-0-Chloroacetylcarbamoyl-l^-0-isopropylidene-3-[(25r3S)-(3-phenyl- propyloxiran-2-yl)]-4-0-methyl-f}-D-psicopyranose and 5-O-Chloroacetyl- carbamoyl-l,2-0-isopropyIidene-3-[(2/?,3/f)-(3-phenylpropyloxiran-2-yl)]- 4-O-methyl-P-o-psicopyranose Diast£r£oisomfere A Diastdr^oisomere B These two diastereoisomers are obtained following the procedures described in Examples 43 to 46, replacing 5-methylhex-l-yne in Example 43 with 5-phenylpent-l-yne. Spectral characteristics Diastereoisomer A : iH NMR (DMSO) 8 (ppm): 1.35 (3H, s); 1.45 (3H, s); 1.75 (2H, m); 1.90 (IH, m); 2.05 (IH, txd); 2.60 (2H, t); 2.95 (IH, q); 3.00 (IH, s); 3.30 (3H, s); 3.60 (IH, d) ; 3.80 (2H, m, of which 1 exchangeable with D2O); 3.90 (IH, s); 4.00 (IH, d); 4.50 (3H, m); 5.30 (IH, s broad); 7.30 (5H, m); 11.01 (IH, s, exchangeable with D2O). Spectral characteristics Diastereoisomer B : *H NMR (DMSO) 6 (ppm): 1.35 (3H, s); 1.45 (3H, s); 1.80 (3H, m); 2.00 (IH, m) ; 2.65 (2H, t); 2.85 (IH, m); 2.95 (IH, d); 3.35 (3H, s); 3.70 (IH, d); 3.80 (IH, d); 3.85 (IH, s); 4.00 (IH, d) ; 4.10 (2H, d, of which IH exchangeable with D20) ; 4.45 (2H, s); 5.25 (IH, s broad); 7.30 (5H, m); 11.00 (IH, s, exchangeable with D20). Elemental analysis: (empirical formula: C24H32C1N09 M = 513.97) C H N CI % calc. 56.09 6.28 2.73 6.90 Diastereoisomer A % found 56.44 6.29 2.73 6.84 Diastereoisomer B % found 56.55 6.49 2.53 6.78 Example 50:5-0-Chloroacetylcarbamoyl-3-desoxy-l,2-0-isopropylidene-3-(3-phenyl-propyloxiran-2-yl)-4-0-methyl-p-D-fructopyranose A O O S "A'tn/ S I = H i^O CH3O H H -44- gj 2 Step A : l,2:4,5-di-0-isopropylidene-3-methyloxalyl-3-(5-phenylpent-l-yne)-j}-D-fructo-pyranose I By replacing 5-methylhex-l-yne in Example 43 with 5-phenylpent-l-yne, the desired 1,2:4,5-di-0-isopropylidene-3-(3-phenylpropyloriran-2-yl)-P-D-psicopyranose (a single isomer) is 5 obtained in a yield of 88% after chromatography ou silica gel (eluant: pentane/diethyl ether, 2:1). To a solution, cooled to -78°C, of 13.72 g (34.08 mmol) of that compound in 250 ml of | anhydrous tetrahydrofuran there are added dropwise, under a nitrogen atmosphere, 44 ml of n-butyllithium (1.6 molar in hexane, i.e. 70.40 mmol). The whole is stirred at -78°C for 1.5 10 hours, and 9.20 ml (106.6 mmol) of methyloxalyl chloride are introduced dropwise. The reaction mixture is stirred under a nitrogen atmosphere for 1.75 hours and for 30 minutes at room temperature. The mixture is then poured into a saturated aqueous sodium hydrogen carbonate solution cooled to 0°C (250 ml). After customary treatment of the organic phase there are obtained 24 15 g of an oily residue, which is chromatographed on silica gel (eluant: methylene chloride/ethyl acetate, 99:1) to give 10.44 g (21.38 mmol) of the desired product in the form of a colourless oil. Yield: 54% (2 steps) Spectral characteristics: 20 iH NMR (DMSO) 8 (ppm): from 1.10 to 1.50 (12H, 4s); 1.72 (2H, q) ; 2.28 (2H, t); 2.70 (2H, t); 3.82 (3H, s); 3.90 (2H, m) ; 4.18 (IH, dd); 4.40 (2H, m); 4.78 (IH, d) ; 7.20 (3H, m); 7.30 (2H, m). Step B: l,2:4,5-di-0-isopropylidene-3-desoxy-3-(5-phenylpent-l-yne)-P-D-fructopyranosc 85 mg of 2,2'-azobis-(2-methylpropionitrile) (0.52 mmol) and 1.79 ml (6.65 mmol) of £f>5 tributyltin hydride are added in succession to a solution of the compound described in step A (2.50 g; 5.11 nunol) in 70 ml of anhydrous toluene. The whole is heated at reflux of the toluene for one uour, and a further 0.25 ml (0.93 mmol) of tributyltin hydride is added. After refluxing for a futher one hour, the toluene is evaporated off under reduced pressure and the resulting oily residue is dissolved in 70 ml of diethyl ether. 30 ml of an aqueous potassium 30 fluoride solution (3.6 molar) are added, and then the two phases are separated. After customary treatment of the organic phase there are obtained 4.29 g of an oily residue, which is chromatographed on silica gel (eluant: pentane/ethyl acetate, 15:1) to give 0.62 g (1.60 mmol) of the desired product in the form of a colourless oil. Yield: 31% 272 69 M = 386.49) Step C: 5-0-Chloroacetylcarbamoyl-3-desoxy-l,2-0-isopropylidene-3-(3-phenyl-propyloxiran-2-yl)-4-0-methyl-P-D-fnictopyranose Hydrogenation of a solution of 0.62 g (1.60 mmol) of the compound described in step B in 10 ml of benzene in the presence of 0.29 g of Lindlar catalyst for 45 minutes yields, after filtration and evaporation, the desired compound (0.60 g; 1.54 mmol) in the form of a yellow-coloured oil, which is used for the following step without being purified (crude yield: 96%). Following the experimental protocols described in Examples 1 (step C) to 4, starting from the compound described above, there is obtained 5-0-chloroacetylcarbamoyl-3-dehydroxy-1,2-0-isopropylidene-3-[(5'-phenyl)pentyloxiran-l'-yl]-4-methoxy-p-D-fructopyranose in the form of a white-coloured foam. Elemental analysis: (empirical formula: C24H32CINO8 M = 497.97) C H N a % found 57.53 6.52 2.78 7.07 % calc. 57.89 6.48 2.81 7.12 -45- ► Elemental analysis: (empirical formula: C23H30O5 C H % found 71.04 7.90 % calc. 71.48 7.82 Example 51 : 3^-di-0-Chloroacetylcarbamoyl-1^2-0-isopropylidene-3-(3-phenylpropyl 0.50 ml (5.87 mmol) of chloroacetyl isocyanate is added, at room temperature and under a nitrogen atmosphere, to a solution of 0.61 g (1.19 mmol) of diastereoisomer A of Example 49 in 7 ml of anhydrous tetrahydrofuran. The reaction mixture is heated at reflux of the tetrahydrofuran for 20 hours, and a further 0.20 ml of chloroacetyl isocyanate is added. The whole is again re fluxed for 24 hours, and then the reaction solution is poured into 5 ml of ice-water. After one hour's stirring and customary treatment of the organic phase there is obtained -46- 07 9 o 10 an oily residue, which is chromatographed on silica gel (eluant: diethyl ether) to give 0.42 g (0.66 mmol) of the desired product in the form of a white-coloured foam. Yield: 55% Elemental analysis: (empirical formula : C27H34CI2N2O11 M = 633.48) 5 C H N CI % found 51.82 5.74 4.04 10.88 % calc. 51.19 5.41 4.42 11.19 Example 52 : 3,5-di-0-Chloroacetylcarbamoyl-l,2-0-isopropylidene-4-0-niethyI-3-(5-phenylpentyl)-P-D-psicopyranose u u OUk N I - = H CHjO = yV° o o Following the procedure described for the preparation of Examples 43 and 44, replacing 5-methylhex-l-yne with 5-phenylpent-l-yne, the desired l,2-0-isopropylidene-3-(5-phenylpent-l-enyl)-4-0-methyl-P-D-psicopyranose is obtained. Hydrogenation of 1.97 g (5.23 mmol) of that compound in the presence of 0.90 g of palladium-on-carbon (10%) in 100 ml of ethyl 15 acetate yields l,2-0-isopropylidene-3-(5-phenylpentyl)-4-0-methyl-p-D-psicopyranose. That compound (0.55 g; 1.44 mmol) is dissolved in 9 ml of methylene chloride in the presence of 0.27 ml (3.17 mmol) of chloroacetyl isocyanate in accordance with the procedure described for the preparation of Example 3. After chromatography on silica gel (eluant: diethyl ether/-pentane, 2:1), 0.74 g (1.19 mmol) of the desired product is obtained in the form of a white-20 coloured foam. Yield (last step): 82% Elemental analysis: (empirical formula: C27H36CI2N2O10 M = 619.50) C H N a % found 52.72 5.88 4.35 11.34 25 % calc. 52.35 5.86 4.52 11.45 -47- O 7 n ^ ! L O Example 53: 3,5-di-0-Chloroacetylcarbamoyl-3-isopropyl-l,2-0-isopropylidene-4-0-methyl-P-D-psicopyranose X o o o o S *«.,/ H CH.O = o o 1.00 g of palladium-on-carbon (10%) is added to a solution of 1.35 g (4.92 mmol) of 1,2-0-5 isopropylidene-3-isopropenyl-4-0-methyl-P-D-psicopyranose (Example 2) in 50 ml of ethyl acetatc. The reaction mixture is stirred under a hydrogen atmosphere for 20 hours and is then filtered. After evaporation, the crude product is isolated quantitatively in the form of an oil. That compound (1.35 g; 4.88 mmol) is dissolved in 30 ml of methylene chloride in the presence of 1.25 ml (14.67 mmol) of chloroacetyl isocyanate, in accordance with the 10 procedure described for the preparation of Example 3. After chromatography on silica gel (eluant: pentane/ethyl acetate, 2:1), 1.84 g (3.57 mmol) of the desired product are obtained in the form of a white-coloured foam. Yield (last step): 73% Elemental analysis: (empirical formula: C19H28CI2N2O10 M = 515.34) 15 C H N CI I % found 43.92 5.57 5.25 13.44 % calc. 44.28 5.48 5.44 13.76 Example 54 : 3,5-di-0~ChIoroacetylcarbamoyl-l,2-0-isopropylidene-3-(2-methyloxiran-2-yl)-4-0-methyI-P-D-fructopyranose X o o c,^xo,y^0 H CH-0 = YY-c, 20 00 1.55 ml (18.20 mmol) of chloroacetyl isocyanate are added, at room temperature and under a nitrogen atmosphere, to a solution of 1.50 g (3.66 mmol) of the compound described in Example 4 in 15 ml of anhydrous tetrahydrofuran. The reaction mixture is heated at reflux of -48 27289 the tetrahydrofuran for 21 hours, and then the reaction solution is poured into 10 ml of ice-water. After one hour's stirring and customary treatment of the organic phase there is obtained an oily residue, which is subjected to HPLC chromatography on grafted silica gel (RP 18; eluant: acetonitrile/water, 40:60) to give 0.47 g (0.89 mmol) of the desired product in the form ; of a white-coloured foam. Xisld:24% Elemental analysis: (empirical formula: C19H26CI2N2O11 M = 529.33) C H N CI % found 42.78 4.84 4.80 16.48 ) % calc. 42.01 4.85 5.09 16.06 Example 55 : l,2-Carbonate-5-0-chloroacetylcarbamoyl-4-methoxy-3-(5-phenylpentyl> p-D-psicopyranose Step A : l,2-0-isopropylidene-5-0-benzyl-4-0-methyl-3-(5-phenylpent-l-enyl)-j3-D-psico-pyranose Following the procedure described for the preparation of Examples 43 and 44, replacing 5-methylhex-l-yne with 5-phenylpent-l-yne, the desired l,2-0-isopropylidene-3-(5-phenylpent-1-enyl) is obtained. To a solution of 2.(1 g (5.31 mmol) of that compound in 10 ml of anhydrous tetrahydrofuran there are added ai 0°C 0.28 g of sodium hydride (60% in oil) and 0.20 g (0.54 mmol) of tetrabutylammonium iodide. After 30 minutes' stirring at 0°C, 0.76 ml (6.39 mmol) of benzyl bromide is added and the reaction mixture is stirred at room temperature for 19 hours. After customary treatment of the organic phase and chromatography on silica gel (eluant: pentane/diethyl ether, 4:1), 2.30 g (4.91 mmol) of the desired compound in the form of a colourless oil are obtained. Yield: 92% Spectral characteristics: *H NMR (DMSO) 8 (ppm): 1.28 (3H, s) ; 1.38 (3H, s); 1.60 (2H, m); 2.40 (2H, m); 2.55 (2H, t) ; 3.30 (3H, s); 3.39 (IH, s broad); 3.75 (IH, dd); 3.82 (IH, d); 3.95 (IH, dd); 4.00 -49- X / J M. _ 2728?) (IH, d) ; 4.03 (1H, s broad) ; 4.48 (IH, s, exchangeable with D2O); 4.61 (IH, d); 4.71 (IH, d); 5.25 (IH, d); 5.52 (IH, m); from 7.10 to 7.40 (10H, m). Step B: l,2-carbonate-5-0-benzyl-4-0-methyl-3-(5-phenylpent-l-enyl)-fi-D-psicopyranose Following the procedure described for the preparation of Example 9, starting from 1.75 g i (3.73 mmol) of the compound described in the preceding step and 18 g of acidic resin (DOWEX 50X8-100) in 60 ml of a tetrahydrofuran/water mixture, 1:1, 1.19 g (2.77 mmol; 74%) of crude product are obtained in the form of a yellow-coloured oil. To a solution of 1.10 g (2.57 mmol) of that compound in 20 ml of anhydrous tetrahydrofuran there are added in portions of 1.50 g, over a period of 72 hours, while heating at reflux, 5.50 g (33.91 •nrool) of 10 N,N-carbonyldiimidazole. The reaction mixture is subsequently diluted with diethyl ether and then washed with a molar solution of hydrochloric acid. The organic phase is subsequently neutralised with sodium hydrogen carbonate and then dried over magnesium sulphate and evaporated. An oily residue is obtained, which is chromatographed on silica gel (eluant: pentane/diethyl ether, 3:1). 0.80 g 15 (1.77 mmol) of the desired compound in the form of a white foam is obtained. lisld: 51% (2 steps) Spectral characteristics: iH NMR (DMSO) 8 (ppm) : 1.61 (2H, m) ; 2.40 (2H, m); 2.58 (2H, t); 3.45 (3H, s) ; 3.55 (IH, s); 3.75 (2H, m); 3.80 (IH, m) ; 4.22 (IH, d); 4.30 (IH, d); 4.55 (2H, s); 5.15 (IH, d); 20 5.33 (IH, s, exchangeable with D20); 5.60 (IH, m); from 7.15 to 7.40 (10H, m). I Step C: l,2-carbonate-5-0-chloroacetylcarbamoyl-4-0-methyl-3-(5-phenylpentyl)-^-D-psico-pyranose 0.40 g of palladium-on-carbon (10%) is added to a solution of 0.70 g (1.55 mmol) of 1,2-| carbonate-5-0-benzyl-4-0-methyl-3-(5-phenylpent-l«nyl]-P-D-psicopyranose described in 25 the preceding step in 40 ml of ethyl acetate. The reaction mixture is stirred under a hydrogen atmosphere for 4 hours and is then filtered. After evaporation, the crude product is isolated quantitatively. That compound (0.48 g; 1.31 mmol) is dissolved in 10 ml of methylene chloride in the presence of 0.39 ml (4.58 mmol) of chloroacetyl isocyanate at 0°C for 3 hours. After customary treatment of the organic phase and 30 chromatography on silica gel (eluant: heptane/ethyl acetate, 5:2), 0.32 g (0.66 mmol) of the desired compound in the form of a white foam is obtained. Yield: 50% -50- 272890 Elemental analysis : (empirical formula : C22H28CINO9 M = 485.92) C H N CI % found 54.98 5.85 2.90 7.66 % calc. 54.38 5.81 2.88 7.30 Example 56 : l,2-Carbonate-3,5-di-0-chloroacetylcarbamoyl-4-0-methyl-3-(5-phenyl-pentyl)-P-D-psycopy ranose 0 0.13 ml (1.53 mmol) of chloroacetyl isocyanate at room temperature is added to a solution of l,2-carbonate-5-0-chloroacetylcarbamoyl-4-0-methyl-3-(5-phenylpentyl)-f}-D-psicopyranose (0.21 g; 0.43 mmol) in 6 ml of anhydrous methylene chloride. The reaction mixture is stirred under a nitrogen atmosphere for 49 hours. After customary treatment of the organic phase and chromatography on silica gel (eluant: pentane/ethyl acetate, 1:1), 0.22 g (0.36 mmol) of the desired compound in the form of a white foam is obtained. O O S I H CH,0 O O XifiM:84% Elemental analysis: (empirical formula: C25H30CI2N2O1 j M = 605.43) C H N CI % found 49.88 5.01 4.28 11.47 % calc. 49.60 4.99 4.63 11.71 979 GC -- u ^ PHARMACOLOGICAL STUDY Example A : Cytotoxicity of the compounds and of the reference products • Three cell lines were used: - 1 murine leukaemia, L1210, 5 -1 human epidermoid carcinoma, A431, -1 primary culture of endothelial cells of pig aorta, ECPA. The cells are cultured in complete RPMI 1640 culture medium containing 10% foetal calf serum, 2 mM glutamine, 50 units/ml of penicillin, 50 pig/ml of streptomycin and 10 raM HEPES (pH = 7.4). io The cells are distributed on microplates and exposed to the cytotoxic compounds. The cells are then incubated for 2 days (L1210), 3 days (ECPA) and 4 days (A431). The number of viable cells is then quantified by means of a colorimetric assay, the Microculture Tetrazolium Assay (Carmichael J., DeGraff W.G., Gazdar A.F., Minna J.D. and Mitchell J.R., Evaluation of a tetrazolium-based semiautomated colorimetric assay : assessment of chemosensitivity 15 testing, Cancer Res., 47,936-942, (1987)). The compounds of the present invention exhibited a very considerable cytotoxic effect on the three cell lines. By way of example, the IC50S (concentrations of cytotoxic agent that inhibit the proliferation of the treated cells by 50%) are from 3 to 10 times lower than those of fumagillin, depending )20 upon the cell line. Example B : Inhibition of the neovascularisation of the chorio-allantoid membrane of chicken embryos This test is carried out using chicken embryos as previously described (Crum R., Szabo S. and Folkman J., Science, (1985), 230, 1375-1378). Fertilised eggs (dO) are incubated at 37°C. An 25 air pocket is created by removing 1 ml of albumin (d3), then a window is cut in the shell (d4) and the vitellary membrane is removed in order to free the chorio-allantoid membrane (CAM). The test products are dissolved in ethanol and placed on methylcellulose disks, which are dried and placed on the CAM 48 hours later (d6). Between 8 and 16 eggs are used per group. The area around the disk is then examined 48 hours later. The eggs exhibiting an avascular 30 area greater than 4 mm in diameter are counted and the results are expressed as the percentage of eggs having an avascular area. The results obtained are shown in the Table below: </div>

Claims

<div class="application article clearfix printTableText" id="claims"> -52- Inhibition of the neovascularisation of the chorio-allantoid membrane of chicken embryos (dose 125 nM) Example % 3 59 ±6 4 84 ± 4 6 51 ±5 8 55 13 55 ±3 17 48 ± 12 20 59 ±6 22 57 ± 12 42 (Diast A) 53 ± 13 46 (Diast A) 68 ± 12 46 (Diast B) 75 ±13 49 (Diast A) 76 ±7 49 (Diast. B) 79 ±7 50 75 ±8 52 88 ±5 53 95 ±5 55 90 56 60 Fumagillin 80 5 Example C : Pharmaceutical composition : tablets Preparation formula for 1000 tablets containing a dose of 50 mg: compound of Example 49 50 g wheat starch 15 g corn starch 15 g 10 lactose 65 g magnesium stearate 2 g silica 1 g hydroxypropylcelluiose 2 g -53- 9 WE CLAIM IS: Compounds of formula (I): A \ R, (D in which: A - either represents -ORg, and B represents -CH2-X, - or, together with B and the carbon atom carrying them, forms an oxygen-containing heterocycle selected from oxirane, 2,2-dimethyl[l,3]dioxolane and [ 1,3]dioxolan-2-one, in which Y and Z either each represent hydrogen or together form a double bond or together form, with the carbon atoms carrying them, an oxirane ring, and R2 is selected from hydrogen, a hydroxy radical and the radical -OR9, - or represents the radical: in which n is an integer from 1 to 4 inclusive and Y and Z either each represent hydrogen or together form a double bond or together form, with the carbon atoms carrying them, an oxirane ring, and R2 represents hydrogen, - or Rj represents hydrogen * * and R2 represents the radical: —c—CH as defined above, Rj - either represents the radical: —C—CH Y Z 17 r —O-fCH^C-CH Y Z Y Z is selected from hydrogen, a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, an optionally substituted benzyl radical, an optionally substituted benzoyl radical, an optionally substituted • 2728S formyl radical, a linear or branched, optionally unsaturated and optionally substituted acyl radical having from 1 to 6 carbon atoms, an allyl radical, and an optionally mono- or di-substituted carbamoyl radical, R4 . either is selected from a hydroxy radical, a linear or branched, optionally substituted s alkoxy radical having from 1 to 6 carbon atoms, an optionally mono- or di-substituted carbamoyloxy radical, a piperazinylcarbonyloxy radical substituted in the 4-position by the radical R9, and an imidazol-l-ylcarbonyloxy radical, and r5 represents hydrogen, - or, together with r5 and the carbon atom carrying them, forms a carbonyl group, 10 r^, r7 and Rs are selected, each independently of the others, from hydrogen, a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, and a phenylalkyl radical in which the phenyl 3?oup is optionally substituted and the alkyl group, which is linear or branched and is optionally substituted, has from 1 to 6 carbon atoms, 15 r9 is selected from hydrogen, a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, an optionally substituted formyl radical, a linear or branched, optionally unsaturated and optionally substituted acyl radical having from 1 to 6 carbon atoms, a linear or branched, optionally substituted alkoxycarbonyl radical having from 1 to 6 carbon atoms, an optionally substituted benzyl radical, and an 20 optionally mono- or di-substituted carbamoyl radical, and X is selected irom a hydroxy radical, a halogen atom, an optionally substituted phenyl-sulphonyloxy radical, and an optionally substituted linear or branched alkylsulphonyloxy radical having from 1 to 6 carbon atoms, where appropriate their optical and geometrical isomers, in pure form or in the form of a 25 mixture, and, where appropriate, their pharmaceutically acceptable addition salts with an acid, wherein: - the term "optionally mono- or di-substituted" associated with the above-defined carbamoyl and carbamoyloxy radicals indicates that one or both of the hydrogen atoms carried by the nitrogen atom may be substituted (independently of each other when both hydrogen atoms are 30 substituted) by: 272890 - a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, - an optionally substituted formyl radical, - a linear or branched, optionally unsaturated and optionally substituted acyl radical having from 1 to 6 carbon atoms, - an optionally substituted benzoyl radical, - an optionally substituted phenyl radical, - an optionally substituted naphthyl radical, and - an amino radical optionally substituted by one or two alkyl radicals having from 1 to 6 carbon atoms in a straight or branched chain, each alkyl radical being optionally substituted, - the term "optionally substituted" associated with the alkyl, alkoxy, alkoxycarbonyl, formyl, acyl, benzyl, benzoyl, phenyl and naphthyl radicals indicates that those radicals may be substituted by one or more chemical entities selected from hydroxy, halogen, trihalomethyl, amino, alkylamino, dialkylamino, linear or branched alkoxy having from 1 to 6 carbon atoms, linear or branched alkoxycarbonyl having from 1 to 6 carbon atoms, and linear or branched acyl having from 1 to 6 carbon atoms, - the term "optionally substituted" associated with the alkylsulphonyloxy and phenyl-sulphonyloxy radicals indicates that those radicals may be substituted by one or more linear or branched alkyl radicals having from 1 to 6 carbon atoms, and - the term "unsaturated acyl radical" is to be understood as meaning more especially the aciyloyl and methacryloyl radicals. Compounds according to claim 1 in which A and 5 together form, with the carbon atom carrying them, the 2,2-dimethyl[l,3]dioxolane ring, where appropriate their optical and geometrical isomers, in pure form or in the form of a mixture, and, where appropriate, their pharmaceutically acceptable addition salts with an acid. Compounds according to claim 1 in which A and B together form, with the carbon atom carrying them, the oxirane ring, where appropriate their optical and geometrical isomers, in pure form or in the form of a mixture, and, where appropriate, their pharmaceutically acceptable addition salts with an acid. -56- 27288 Compound according to claim 1 which is 5-O-chloroacetylcarbamoyl-1,2-O-isopropylidene-3-(3-phenylpropyloxiran-2-yl)-4-0-methyl-P-D-psicopyranose. Compound according to claim 1 which is 5-0-chloroacetylcarbamoyl-l,2-0- isopropylidene-3-[(2S,3S)-(3-phenylpropyloxiran-2-yl)]-4-0-methyl-|}-D-psicopyranose. Compound according to claim 1 which is 5-O-chloroacetylcarbamoyl-1,2-0-isopropylidene-3-[(2/?,3/?)-(3-phenylpropyloxiran-2-yl)]-4-0-methyl-P-D-psicopyranose. Compound according to claim 1 which is 5-O-chloroacetylcarbamoyl-1,2-0- isopropylidene-3-(2-methyloxiran-2-yl)-4-0-methyl-p-D-psicopyranose, and its optical isomers. Compound according to claim 1 which is 1-bromo-1 -desoxy-3-(2-methyloxiran-2-yl)- 4-0-methyl-5-0-methylcarbamoyl-P-D-psicopyranose, and its optical isomers. Compound according to claim 1 which is 5-0-{ l-[4-((2,3>4-trimethoxybenzy l)piperazinyl)]carbonyl} -1,2-0-isopropylidene-3-(2-methyloxiran-2-yl)-4-0-methyl-P-D-psicopyranose, and its optical isomers. Compound according to claim 1 which is 4,5-di-O-chloroacetylcarbamoyl-1,2-0- isopropylidene-3-(2-methyloxiran-2-yl)-P-D-psicopyranose, and its optical isomers. Compound according to claim 1 which is (lS,6tf,7/?,8R)-8-isopropenyl-6,7-dimethoxy-1,4-dioxaspiro[2,5]octan-8-ol. Compound according to claim 1 which is 5-0-chloroacetylcarbamoyl-l,2-0- isopropylidene-3-(2:3-epoxypropyl)-4-0-methyl-P-D-fructopyranose, and its optical isomers. Compound according to claim 1 which is 5-O-chloroacetylcarbamoyl-1,2-0- isopropylidene-3-(3-isopentyloxiran-2-yl)-4-0-methyl-p-D-psicopyranose, and its optical isomers. -57- 272890 Process for the preparation of a compound of formula (I) according to claim 1, characterised in that l,2:4,5-di-0-isopropylidene-(3-D-fructopyranose of formula (II): prepared in accordance with the procedure described by E J. Prisbe et al. (J. Org. Chem, 41, (1976), 1836-1846), is subjected either : to an oxidising agent, so as to obtain the ketone of formula 031): which is subjected to the action of a compound of formula (TVa) prepared from the corresponding vinyl halide : in which R7 and Rg are selected, each independently of the other, f om hydrogen, a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, and a phenylalkyl radical in which the phenyl group is optionally substituted and the alkyl group, which is linear or branched and is optionally substituted, has from 1 to 6 carbon atoms, (HI) Li R7 R, (IVa) in order to obtain the compound of formula (Vaj): -58- 2 0 (Vaj) in which R7 and Rg are as defined above, which may optionally be subjected to the action of an alkyl halide, an acyl halide, a benzyl halide, an alkyl haloformate or an isocyanate in order to yield the compound of formula (Va2): in which R7 and Rg are as defined above and R'9 is selected from a linear or branched, optionally substituted alkyl radical containing from 1 to 6 carbon atoms, an optionally substituted formyl radical, an optionally substituted acyl radical containing from 1 to 6 carbon atoms, an optionally substituted benzyl radical, a linear or branched, optionally substituted alkoxycarbonyl radical containing from 1 to 6 carbon atoms, and an optionally mono- or di-substituted carbamoyl radical, which compound of formula (Vai) may optionally be subjected to the action of methyloxalyl chloride, in the presence of n-butyllithium, so as to obtain the compound of formula (Va3>: O I CHj in which R7 and Rg are as defined above, 272890 which is then subjected to the action of tributyltin hydride in order to yield the compound of formula (Va4): X (Va4) in which R7 and Rg are as defined above, the totality of the compounds of formulae (Vaj) and (Va2) forming the compound of formula (Va): ft h"iir in which R7 and Rg are as defined above and R9 is selected from hydrogen and the radical R'9 as defined above, "10 or: directly to the action of a compound of formula (IVb): Br-.CHA-T ^ K in which R7 and Rg are as defined above and n is an integer from 1 to 4 inclusive, in order to obtain the compound of formula (Vb) I L A O^^T^O-^n—(Vb) R. 15 -60- 27289 in which R7, Rg and n are as defined above, the compounds of fonnulae (Va4), (Va) and (Vb) then being hydrolysed in an acidic medium to yield the diols of formulae (VIa4), (Via) and (Vlb), respectively: f'-K r4$ r4$ (VIa4) (Via) (Vlb) in which R7, Rg, R9 and n are as defined above, which compounds of formulae (VIa4), (Via) and (Vlb) may be regioselectively substituted in the presence of dibutyltin oxide so as to obtain the compounds of formulae (VIIa4), (Vila) and (Vllb), respectively: .x X -Cfc"- dr' -j"' °—(CH2>n i Si""< °R'3 R, (VIIa4) (VDa) (VEb) HO Ti \\ = oO HU I ™ \\ or» ^ °R,j \ °r> i in which R7, Rg, R9 and n are as defined above and R'3 is selected from a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, an optionally substituted benzyl radical, an optionally substituted benzoyl radical, an optionally substituted formyl radical, a linear or branched, optionally unsaturated and optionally substituted acyl radical having from 1 to 6 carbon atoms, an allyl radical, and an optionally mono- or di-substituted carbamoyl radical, it being possible for all of the compounds of formulae (VIa4) and (VIIa4), (Via) and (Vila) and (Vlb) and (Vllb) optionally to be subjected to an epoxidation reagent in order to yield the compounds of formulae (Vma4), (Villa) and (VTUb), respectively: -61 - 2 X0 X oV O c; y r°i r rA r r°v° HO-'Vi tP HO HO"Y?,o-(®,I.-4,O *£ I I^Y °*> ^ (vma4) (vma) (vmb) in which R7, Rg, R9 and n are as defined above and R3 is selected from hydrogen and the radical R'3 as defined above, or alternatively to be subjected to catalytic hydrogenation in order to obtain the compounds of 5 formulae (VHTa^, (Villa) and (VlU'b), respectively: •>< rK r°Vl r V ■. HO1"'HO*"( • H ^ £ OR- \ ~~ H \ OR, I OR^ I OR, / ^ R, Rg (Vin'a4) (Vin-a) (vnrb) in which R3, R7, Rg, R9 and n are as defined above, the totality of the compounds of formulae (VIa4), (Via), (Vlb), (\nia4), (Vila), (Vllb), (VH[a4), (Villa), (Vmb), (VIira4), (VHTa) and (Vlll'b) forming the compound of formula 10 (Vm): X o •"III/ r t H°N £i*R' (vni) 0R3 ^2 in which: R, Rg Rj - either represents the radical: —C—CH Y Z in which Y and Z either each represent hydrogen or, IS together form a double bond or together form, with the -62- 27JW0 carbon atoms carrying them, an oxirane ring, and R7 and Rg are as defined above, and R2 is selected from hydrogen, hydroxy and the radical -OR9, - or represents the radical: n r V 18 —o—^CH^C-CH Y Z in which n is an integer from 1 to 4 inclusive and R7, Rg, Y and Z are as defined above, and R2 represents hydrogen, 10 - or Ri represents hydrogen T- * and R2 represents the radical:—C—CH as defined above, Y z and R3 is as defined above, the compound of formula (VHI) then optionally being subjected: - to the action of an alkylating agent under customary conditions, is - to the action of an isocyanic compound in the presence or absence of an activator, I - or to the action of a carbonylating compound, carbonyldiimidazole, yielding the compound of formula (IXa): o f ^1-miiiK (IXa) N K in which Rj, R2 and R3 are as defined above, 20 which compound, under the action of a piperazine substituted in the 4-position by the radical R9, itself yields the compound of formula (IXb): -63- P"7 few (IXb) in which R1.R2.R3 and R9 are as defined above, the totality of the compounds of formulae (VIII), (IXa) and (IXb) forming the compound of formula (IX): T*R. (IX) yO Rj in which Rj, R2 and R3 are as defined above and R4 is selected from a hydroxy radical, a linear or branched, optionally substituted alkoxy radical having from 1 to 6 carbon atoms, an optionally mono- or di-substituted carbamoyloxy radical, a piperazinylcarbonyloxy radical substituted in the 4-position by the radical R9, and an imidazolylcarbonyloxy radical, it also being possible for the compound of formula (Vm) to be subjected to the action of an oxidising agent under the conditions employed for the preparation of the compound of formula (HI), so as to obtain the compound of formula (X): X °>1 J R. £ 5 ,0 Rj (X) in which Rj, R2 and R3 are as defined above, the totality of the compounds of formulae (IX) and (X) forming the compound of formula (XI): -64- 272890 *5 o R* (XI) K in which Rj, R2 and R3 are as defined above and R4 and R5 are as defined for formula (I), which compound (XI) may be: - either : treated in accordance with customary methods of alcoholysis in order to form the compound of formula (XII): in which Rj, R2, R3, R4 and R5 are as defined above and R'g is selected from a linear or branched, optionally substituted alkyl radical having from 1 to 6 carbon atoms, and a phenylalkyl radical in which the phenyl group is optionally substituted and the alkyl group, which is linear or branched and is optionally substituted, has from 1 to 6 carbon atoms, then subjected to customary substitution reactions so as to obtain the compound of formula (XIII): O Rj (XII) o Rj < in which Rj, R2, R3, R4, R5 and R'g are as defined above and X' is selected from a halogen atom, an optionally substituted phenylsulphonyloxy radical, and -65- 272891 an optionally substituted linear or branched alkylsulphonyloxy radical having from 1 to 6 carbon atoms, - or : hydrolysed to form the diol of formula (XIV) : OH OH 4 Rj (XIV) in which R}, R2, R3, R4 and R5 are as defined above, then optionally subjected to customary substitution reactions so as to obtain the compound of formula (XV): 5 R4 £ 5 yO R* Rj (XV) in which Rj, R2, R3, R4, R5 and X' are as defined above, 10 which compound of formula (XV), when X' represents an iodine atom, can be converted, under the action of silver oxide, into the epoxide of formula (XVI): R4 £ 5 /O Rj **3 (XVD in which Rj, R2, R3, R4 and R5 are as defined above, it also being possible for the compound of formula (XTV) to be subjected to the action of 15 N^N-carbonyldiimidazole to yield the compound of formula (XVQ): -66- 27289 0 (XVII) in which Rj, R2, R3, R4 and Rs are as defined above, the compounds of formulae (XI), (XII), (XJE), (XIV), (XV), (XVI) and (XVII) forming the compound of formula (I), which is optionally purified by a customary purification 5 method and the optical and geometrical isomers of which are separated, if desired, by a customary separation method, and which are optionally converted into their pharmaceutically acceptable addition salts with an acid. 15. Pharmaceutical compositions comprising as active ingredient at least one compound according to any one of claims 1 to 13, on its own or in combination with one or more 10 inert, non-toxic, pharmaceutically acceptable carriers. 16. Pharmaceutical compositions according to claim IS having angiogenesis-inhibiting activity, for use in the treatment of affections due to or associated with angiogenesis disorders. 17. A compound of the formula (I) as defined in claim 1, substantially as herein described with reference to any one of examples 1 to 56. 18. A process for the preparation of a compound of formula (I) as defined in claim 1 substantially as herein described with reference to any one of examples 1 to 56. 19. A pharmaceutical composition substantially as herein described with reference to example C. j the authorised agents . %\ PARK & SON M fa*® </div>